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{{Short description|Dense musical chord}}
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A '''tone cluster''' is a ] comprising consecutive tones in a ]. Prototypical tone clusters are based on the ], and are separated by ]s. For instance, three adjacent ] (such as C, C♯, and D) struck simultaneously produce a tone cluster. Variants of the tone cluster include chords comprising consecutive tones separated ], ], or ]. On the piano, such clusters often involve the simultaneous striking of successive white or black keys.


A '''tone cluster''' is a ] comprising at least three adjacent ]s in a ]. Prototypical tone clusters are based on the ] and are separated by ]s. For instance, three ] ] (such as C, C{{music|sharp}}, and D) struck simultaneously produce a tone cluster. Variants of the tone cluster include chords comprising adjacent tones separated ], ], or ]. On the piano, such clusters often involve the simultaneous striking of neighboring white or black keys.
The early years of the twentieth century saw tone clusters elevated to central roles in pioneering works by ] artists ] and ]. In the 1910s, two classical avant-gardists, composer-pianists ] and ], were recognized as making the first extensive explorations of the tone cluster. During the same period, ] deployed them in several compositions that were not publicly performed until the late 1920s or 1930s. ] and, later, composers including ] and ], became proponents of the tone cluster. Today, tone clusters play a significant role in the work of ] musicians such as ] and ], as well as the work of many modern classical composers.


The early years of the twentieth century saw tone clusters elevated to central roles in pioneering works by ] artists ] and ]. In the 1910s, two classical avant-gardists, composer-pianists ] and ], were recognized as making the first extensive explorations of the tone cluster. During the same period, ] employed them in several compositions that were not publicly performed until the late 1920s or 1930s, as did ] in the latter decade. Since the mid-20th century, they have prominently featured in the work of composers such as ], ], ] and ], and later ]. Tone clusters also play a significant role in the work of ] musicians such as ], ], and ].
In most Western music, tone clusters tend to be heard as ]. Clusters may be performed with almost any individual instrument on which three or more notes can be played simultaneously, as well as by most groups of instruments or voices; ]s, because of the arrangement of the playing area, are particularly appropriate for the performance of tone clusters.

In most Western music, tone clusters tend to be heard as ]. Clusters may be performed with almost any individual instrument on which three or more notes can be played simultaneously, as well as by most groups of instruments or voices. ]s are particularly suited to the performance of tone clusters because it is relatively easy to play multiple notes in unison on them.


==Music theory and classification== ==Music theory and classification==
] is designed for playing a diatonic scale on the white keys and a pentatonic scale on the black keys. Chromatic scales involve both. Three immediately adjacent keys produce a basic chromatic tone cluster.]]
Prototypical tone clusters are ]s of three or more adjacent notes on the ], that is, three or more consecutive ] each separated by only a ]. As described by David Nicholls,

<blockquote>
Prototypical tone clusters are chords of three or more adjacent notes on a ], that is, three or more adjacent ] each separated by only a ]. Three-note stacks based on ] and ] ] are also, strictly speaking, tone clusters. However, these stacks involve ] between notes greater than the half-tone gaps of the chromatic kind. This can readily be seen on a keyboard, where the pitch of each key is separated from the next by one semitone (visualizing the black keys as extending to the edge of the keyboard): Diatonic scales—conventionally played on the white keys—contain only two semitone intervals; the rest are full tones. In Western musical traditions, pentatonic scales—conventionally played on the black keys—are built entirely from intervals larger than a semitone. Commentators thus tend to identify diatonic and pentatonic stacks as "tone clusters" only when they consist of four or more successive notes in the scale.<ref>See Nicholls (1991), p. 155.</ref> In standard ] practice, all tone clusters are classifiable as ] chords—that is, they are constructed from ]s (intervals of one semitone), ]s (intervals of two semitones), or, in the case of certain pentatonic clusters, ]s (intervals of three semitones). Stacks of adjacent ] pitches also constitute tone clusters.<ref>Jones (2008), p. 91; Wilkins (2006), p. 145; Norman (2004), p. 47.</ref>
Tone-clusters are essentially chords built from ] and ]s. At the simplest level, a C major ] with added second, ] and ] could be said to consist of two tone-clusters, as could a ], black-note or white-note, chord. More usually, though, the tone-cluster will consist of a larger number of adjacent pitches, either ] (white-note), pentatonic (black-note), or ] (white ''and'' black notes).<ref>Nicholls (1991), p. 155.</ref>

</blockquote>
] collapsed into one octave results in a ] tone cluster<ref>Cope (2001), p. 6, fig. 1.17.</ref>]]]
While three-note stacks based on diatonic and pentatonic ] are technically tone clusters, they involve ] between notes greater than the half-tone gaps of the chromatic kind—because of this, as may be inferred from Nicholls, commentators tend to identify diatonic and pentatonic stacks as "tone clusters" only when they consist of four or more successive notes struck simultaneously. Stacks of three or more adjacent ] pitches also constitute tone clusters. In ] practice, all tone clusters are classifiable as ] chords—that is, the interval between two consecutive notes in a cluster is never more than three semitones. Historically, tone clusters were sometimes discussed with a hint of disdain. One 1969 textbook defines the cluster as "an extra-harmonic clump of notes."<ref>Ostransky (1969), p. 208.</ref>

In tone clusters, the notes are sounded fully and in unison, distinguishing them from ] figures involving ] and the like. Their effect also tends to be different: where ornamentation is used to draw attention to the ] or the relationship between harmony and ], tone clusters are for the most part employed as independent sounds. While, by definition, the notes that form a cluster must sound at the same time, there is no requirement that they must all ''begin'' sounding at the same moment. For example, in ]'s choral ''Epitaph for Moonlight'' (1968), a tone cluster is constructed by dividing each choir section (soprano/alto/tenor/bass) into four parts. Each of the sixteen parts enters separately, humming a note one semitone lower than the note hummed by the previous part, until all sixteen are contributing to the cluster.<ref>Swift (1972), pp. 511–512.</ref>

] of the ], successive harmonics form increasingly small ] the fifth octave of harmonics (16–32)]]]


In tone clusters, the notes are sounded fully and simultaneously, distinguishing them from ] figures involving ] and the like. Their effect also tends to be very different: where ornamentation is used to draw attention to the ] or the relationship between harmony and ], tone clusters are for the most part employed as independent sounds. They also lend themselves to use in a percussive manner. Tone clusters have generally been thought of as dissonant musical textures, and even defined as such.<ref>See, e.g., Seachrist (2003), p. 215, n. 15: "A 'tone cluster' is a dissonant group of tones lying close together...."</ref> As noted by Alan Belkin, however, instrumental ] can have a significant impact on their effect: "Clusters are quite aggressive on the organ, but soften enormously when played by strings (possibly because slight, continuous fluctuations of pitch in the latter provide some inner mobility)."<ref>{{cite web|author=Belkin, Alan|url=http://www.musique.umontreal.ca/personnel/Belkin/bk.H/H6.html|title=Harmony and Texture; Orchestration and Harmony/Timbre|publisher=Université de Montréal|date=2003|accessdate=2007-08-18}}</ref> In his first published work on the topic, ] observed that a tone cluster is "more pleasing" and "acceptable to the ear if its outer limits form a consonant interval."<ref>Cowell (1921), pp. 112, 113.</ref> Tone clusters have generally been thought of as dissonant musical textures, and even defined as such.<ref>See, e.g., Seachrist (2003), p. 215, n. 15: "A 'tone cluster' is a dissonant group of tones lying close together...."</ref> As noted by Alan Belkin, however, instrumental ] can have a significant impact on their effect: "Clusters are quite aggressive on the organ, but soften enormously when played by strings (possibly because slight, continuous fluctuations of pitch in the latter provide some inner mobility)."<ref>{{cite web|author=Belkin, Alan|url=http://www.musique.umontreal.ca/personnel/Belkin/bk.H/H6.html|title=Harmony and Texture; Orchestration and Harmony/Timbre|publisher=Université de Montréal|year=2003|access-date=2007-08-18 |archive-url = https://web.archive.org/web/20070622064614/http://www.musique.umontreal.ca/personnel/Belkin/bk.H/H6.html |archive-date = 2007-06-22}}</ref> In his first published work on the topic, ] observed that a tone cluster is "more pleasing" and "acceptable to the ear if its outer limits form a consonant interval."<ref>Cowell (1921), pp. 112, 113.</ref> Cowell explains, "the natural spacing of so-called dissonances is as seconds, as in the overtone series, rather than sevenths and ninths....Groups spaced in seconds may be made to sound euphonious, particularly if played in conjunction with fundamental chord notes taken from lower in the same overtone series. Blends them together and explains them to the ear."<ref>Cowell, Henry (1969). ''New Musical Resources'', p.111-139. New York: Something Else. {{pre-ISBN}}.</ref> Tone clusters have also been considered noise. As ] says, "clusters have generally been used as a kind of anti-harmony, as a transition between sound and noise."<ref>Kagel, Mauricio. "Tone-clusters, Attacks, Transitions", p.46. Cited in ] (1985). ''The Contemporary Guitar'', p.172. University of California. {{ISBN|9780520040489}}.</ref> Tone clusters thus also lend themselves to use in a percussive manner. Historically, they were sometimes discussed with a hint of disdain. One 1969 textbook defines the tone cluster as "an extra-harmonic clump of notes".<ref>Ostransky (1969), p. 208.</ref>


==Notation and execution== ==Notation and execution==
] ]]]
With his 1917 piece '']'', Cowell introduced a new notation for tone clusters on the piano or other keyboard instrument. In this notation style, only the top and bottom notes of the cluster, connected by a single line or pair of lines, were represented.<ref>The score of ''The Tides of Manaunaun'' is reprinted in ''American Piano Classics: 39 Works by Gottschalk, Griffes, Gershwin, Copland, and Others'', ed. Joseph Smith (Mineola, N.Y.: Courier Dover, 2001; ISBN 0-486-41377-2), pp. 43 et seq.</ref> This developed into the solid-bar style seen in the image on the right. Here the first chord, stretching two ]s from D<sup>2</sup> to D<sup>4</sup>, is a white-note cluster, symbolized by the natural sign below the staff. The second is a black-note cluster, symbolized by the flat sign (a sharp sign would be required if the notes showing the limit of the cluster were spelled as sharps). A chromatic cluster—black and white keys together—is shown in this method by including both a natural and a flat (or sharp) sign with the chord. In his 1917 piece '']'', Cowell introduced a new notation for tone clusters on the piano and other keyboard instruments. In this notation, only the top and bottom notes of a cluster, connected by a single line or a pair of lines, are represented.<ref>The score of ''The Tides of Manaunaun'' is reprinted in ''American Piano Classics: 39 Works by Gottschalk, Griffes, Gershwin, Copland, and Others'', ed. Joseph Smith (Mineola, New York: Courier Dover, 2001; {{ISBN|0-486-41377-2}}), pp. 43 et seq.</ref> This developed into the solid-bar style seen in the image on the right. Here, the first chord—stretching two ]s from D<sub>2</sub> to D<sub>4</sub>—is a diatonic (so-called white-note) cluster, indicated by the natural sign below the staff. The second is a pentatonic (so-called black-note) cluster, indicated by the flat sign; a sharp sign would be required if the notes showing the limit of the cluster were spelled as sharps. A chromatic cluster—black and white keys together—is shown in this method by a solid bar with no sign at all.<ref>Hicks (2002), p. 103.</ref> In scoring the large, dense clusters of the solo organ work ''Volumina'' in the early 1960s, ], using graphical notation, blocked in whole sections of the keyboard.<ref>Griffiths (1995), p. 137.</ref>


The performance of keyboard tone clusters is widely considered an "]"—large clusters require unusual playing methods often involving the fist, the flat of the hand, or the forearm. ] and ] each performed clusters with their elbows; Stockhausen developed a method for playing cluster ] with special gloves.<ref>{{cite web|author=Tyranny, "Blue" Gene|url=http://newmusicbox.org/page.nmbx?id=54tp16|title=88 Keys to Freedom: Segues Through the History of American Piano Music—The Keyboard Goes Bop! and the Melody Spins Off into Eternity (1939 to 1952)|work=NewMusicBox|publisher=American Music Center|date=]|accessdate=2007-08-20}} Cooke (1998), p. 205.</ref> ] would play moving clusters by rolling the backs of his hands over the keyboard. Boards of various dimension are sometimes employed, as in the ] (ca. 1904–19) of ]; they can be weighted down to execute clusters of long duration. For works such as his Piano Concerto (1985) and Grand Duo (1988), ]'s scores call for the use of an "octave bar," a wooden device especially crafted for cluster playing. The performance of keyboard tone clusters is widely considered an "]"—large clusters require unusual playing methods often involving the fist, the flat of the hand, or the forearm. ] and ] each performed clusters with their elbows; Stockhausen developed a method for playing cluster ] with special gloves.<ref>{{cite web|author=Tyranny, "Blue" Gene |url=http://www.newmusicbox.org/page.nmbx?id=54tp16 |title=88 Keys to Freedom: Segues Through the History of American Piano Music—The Keyboard Goes Bop! and the Melody Spins Off into Eternity (1939 to 1952) |work=]|publisher=American Music Center |date=2003-10-01 |access-date=2007-08-20 |url-status=dead|archive-url=https://web.archive.org/web/20110604001431/http://www.newmusicbox.org/page.nmbx?id=54tp16 |archive-date=June 4, 2011 }} Cooke (1998), p. 205.</ref> ] would play moving clusters by rolling the backs of his hands over the keyboard.<ref name=R205>Ratliff (2002), p. 205.</ref> Boards of various dimension are sometimes employed, as in the ] ({{circa}} 1904–19) of ]; they can be weighted down to execute clusters of long duration.<ref name=HR624>Hinson and Roberts (2006), p. 624.</ref> Several of ]'s scores call for the use of an "octave bar", crafted to facilitate high-speed keyboard cluster performance.<ref name=ML135>Miller and Lieberman (2004), p. 135.</ref> Designed by Harrison with his partner ], the octave bar is
<blockquote>
a flat wooden device approximately two inches high with a grip on top and sponge rubber on the bottom, with which the player strikes the keys. Its length spans an octave on a grand piano. The sponge rubber bottom is sculpted so that its ends are slightly lower than its center, making the outer tones of the octave sound with greater force than the intermediary pitches. The pianist can thus rush headlong through fearfully rapid passages, precisely spanning an octave at each blow.<ref name=ML135/>
</blockquote>


==Use in Western music== ==Use in Western music==
The earliest example of tone clusters in a Western music composition thus far identified is in the second movement of ]'s ''Battalia à 10'' (1673) for string ensemble, which calls for several diatonic clusters.<ref>"Earliest Usages: 1. Pitch" in {{cite web|author=Byrd, Donald|url=http://www.informatics.indiana.edu/donbyrd/CMNExtremes.htm|title=Extremes of Conventional Music Notation|publisher=Indiana University, School of Informatics|date=]|accessdate=2007-08-19}}</ref> From the next two centuries, only a few more examples have been identified, none prior to 1861 calling for more than a fleeting instance of the form. The next known composition to feature several clusters—though not, in this case, specifically notated—is the solo piano piece ''Battle of Manassas'', written that year by ] and published in 1866. The score instructs the pianist to represent cannon fire at various points by striking "with the flat of the hand, as many notes as possible, and with as much force as possible, at the bass of the piano."<ref>Quoted in Altman (2004), p. 47.</ref> In 1887, ] became the first important composer in the Western tradition to write an unmistakable chromatic cluster: '']'' opens with an organ cluster (C, C♯, D) that also has the longest notated duration of any scored musical texture known.<ref>"Earliest Usages: 1. Pitch" and "Duration and Rhythm: 2. Longest notated duration, including ties" in .</ref> Still, it was not before the second decade of the twentieth century that tone clusters assumed a recognized place in Western classical music practice.


===Before the 1900s===
===In early-20th-century classical compositions===
The earliest example of tone clusters in a Western music composition thus far identified is in the Allegro movement of ]'s '']'' (1673) for string ensemble, which calls for several diatonic clusters.<ref>"Earliest Usages: 1. Pitch" in {{cite web|author=Byrd, Donald|url=http://www.informatics.indiana.edu/donbyrd/CMNExtremes.htm|title=Extremes of Conventional Music Notation|publisher=Indiana University, School of Informatics (website material based in part on work supported by the National Science Foundation)|date=2010-05-12|access-date=2011-08-29|archive-date=2010-03-08|archive-url=https://web.archive.org/web/20100308113537/http://www.informatics.indiana.edu/donbyrd/CMNExtremes.htm|url-status=dead}}</ref> An orchestral diatonic cluster, containing all the notes of the ], occurs also in the representation of chaos in the opening of ]'s 1737–38 ballet '']''.<ref>Henck (2004), pp. 52–54.</ref>
] was the first composer to be widely known for using tone clusters—though the term itself was not yet used to describe the radical aspect of his work.]]
]
"Around 1910," Harold C. Schoenberg writes, "] was causing a stir by the near–tone clusters in such works as his ''Gumsuckers March.''"<ref>Schoenberg (1987), p. 419.</ref> In 1911, what appears to be the first published classical composition to thoroughly integrate true tone clusters was issued: ''Tintamarre (The Clangor of Bells)'', by Canadian composer ] (1862–1913).<ref>For a discussion of the piece, see {{cite web|author=Keillor, Elaine|url=http://www.collectionscanada.ca/4/1/m5-180-e.html#hhhh|title=Writing for a Market—Canadian Musical Composition Before the First World War|publisher=Library and Archives Canada/Bibliothèque et Archives Canada|date=]|accessdate=2007-08-20}} The of ''Tintamarre'' and its are also available online via Library and Archives Canada/Bibliothèque et Archives Canada. See also Keillor (2000) and {{cite web|url=http://www.thecanadianencyclopedia.com/index.cfm?PgNm=TCE&Params=U1ARTU0000079|title=Anger, Humfrey|publisher=The Canadian Encyclopedia|work=Encyclopedia of Music in Canada|accessdate=2007-08-20}} The early performance history of ''Tintamarre'' has not been established.</ref>
]]
From the next century-and-a-half, a few more examples have been identified, mostly no more than a fleeting instance of the form, for example in the opening of ]'s Cantata '']'', ] 60 ] ] or in the concluding two bars of the "Loure" from the same composer's French Suite No. 5, BWV 816:
]
]
or the collisions that result from the interaction of multiple lines "locked together in ]"<ref>David, H. T. (1945, p. 138) ''J.S.Bach's Musical Offering''. New York, Schirmer</ref> in Bach's '']'':
]
]


In the keyboard sonatas of ] (1685–1757), we find a more daring and idiosyncratic use of tone clusters. In the following passage from the late 1740s, Scarlatti builds the dissonances over several bars:
Within a few years, the radical composer-pianist ] became one of the most famous figures in classical music on both sides of the Atlantic for his performances of cutting-edge work. In 1914, Ornstein debuted several of his own solo piano compositions: ''Wild Men's Dance'' (aka ''Danse Sauvage''; ca. 1913–14), ''Impressions of the Thames'' (ca. 1913–14), and ''Impressions of Notre Dame'' (ca. 1913–14) were the first works to explore the tone cluster in depth ever heard by a substantial audience. ''Wild Men's Dance'', in particular, was constructed almost entirely out of clusters ({{Audio|Ornstein-Wild Mens Dance.ogg|listen}}).<ref>See Broyles (2004), p. 78, for premiere of these works. The piano music for Ornstein's Sonata for Violin and Piano, op. 31 (1915; not 1913 as is often erroneously given), also employs true tone clusters, though not to the extent of ''Wild Men's Dance''. ''Three Moods'' (ca. 1914) for solo piano has been said to contain clusters (Pollack , p. 44); perusal online of the published score, however, does not reveal any. Ornstein's solo piano piece ''Suicide in an Airplane'' (n.d.), which makes incontrovertible use of tone clusters in one extended passage, is often erroneously dated "1913" or "ca. 1913"; in fact, it is undated and there is no record of its existence before 1919 (Anderson ).</ref> In 1918, critic Charles L. Buchanan described Ornstein's innovation: " gives us masses of shrill, hard dissonances, chords consisting of anywhere from eight to a dozen notes made up of half tones heaped one upon another."<ref>Quoted in Chase (1992), p. 450.</ref>
]
]


Ralph Kirkpatrick says that these chords "are not clusters in the sense that they are arbitrary blobs of dissonance, nor are they necessarily haphazard fillings up of diatonic intervals or simultaneous soundings of neighboring tones; they are logical expressions of Scarlatti's harmonic language and organic manifestations of his tonal structure."<ref>Kirkpatrick (1953), p. 231.</ref> Frederick Neumann describes Sonata K175 (1750s) as "full of Scarlatti's famous tone clusters".<ref>Neumann (1983), pp. 353–354.</ref> During this era, as well, several French programmatic compositions for the harpsichord or piano represent cannon fire with clusters: works by François Dandrieu (''Les Caractères de la guerre'', 1724), ] (''La Victoire d'un combat naval, remportée par une frégate contre plusieurs corsaires réunis'', 1780), ] (''March des Marseillois'', 1793), Pierre Antoine César (''La Battaille de Gemmap, ou la prise de Mons'', {{circa}} 1794), Bernard Viguerie (''La Bataille de Maringo, pièce militaire et hitorique'', for piano trio, 1800), and ] (''Battaille d'Austerlitz'', 1805).<ref>Henck (2004), pp. 32–40.</ref>
Clusters were also beginning to appear in more pieces by European composers. The ] score for ]'s stage show ''The Yellow Sound'' (1909) employs a chromatic cluster at two climactic points.<ref>Finney (1967), p. 74.</ref> ]'s Four Pieces for clarinet and piano (1913) calls for clusters along with other avant-garde keyboard techniques.<ref>Pino (1998), p. 258.</ref> ]'s 1915 arrangement for solo piano of his ''Six Epigraphes Antiques'' (1914), originally a set of piano duets, includes tone clusters in the fifth piece, ''Pour l'Egyptienne''.<ref>Hinson (1990), pp. 43–44.</ref>


A dramatic use of a "virtual" tone cluster can be found in ]'s song "]" (1815–21). Here, a terrified child calls out to his father when he sees an apparition of the sinister Erl King. The dissonant voicing of the dominant minor ] used here (C<sup>7{{music|flat}}9</sup>) is particularly effective in heightening the drama and sense of threat.
Though much of his work was made public only years later, ] had been exploring the possibilities of the tone cluster for some time. In 1906–7, Ives composed his first mature piece to extensively feature tone clusters, ''Scherzo: Over the Pavements''.<ref>Thomas B. Holmes notes that the song ''Majority'' (aka ''The Masses''), written by Ives in 1888 at the age of fourteen, incorporates tone clusters in the piano accompaniment. He correctly describes this as "a rebellious act for a beginning composer." He errs in calling it "probably the first documented use of a tone cluster in a score" (''Electronic and Experimental Music: Pioneers in Technology and Composition'' , p. 35). Swafford (1998) observes that Ives chose to begin his ''114 Songs'' (publ. 1922) with the work (pp. 227, 271, 325). And he too miscredits Ives with the "invention of the tone cluster" (p. 231). On the other hand, he valuably points to Ives's awareness that "tone clusters...had been there since time immemorial when large groups sang. The mistakes were part of the music" (p. 98).</ref> Orchestrated for a nine-piece ensemble, it includes both black- and white-note clusters for the piano.<ref>Nicholls (1991), p. 57.</ref> Revised in 1913, it would not be recorded and published until the 1950s and would have to wait until 1963 to receive its first public performance. During the same period that Ornstein was introducing tone clusters to the concert stage, Ives was developing a piece with what would become the most famous set of clusters: in the second movement, ''Hawthorne'', of the ] (ca. 1904–19, publ. 1920, prem. 1928), mammoth piano chords, some gentle, some violent, require a wooden bar almost fifteen inches long to play.<ref>Reed (2005), p. 59; Swafford (1998), p. 262.</ref> Between 1911 and 1913, Ives also wrote ensemble pieces with tone clusters such as his Second String Quartet and the orchestral ''Decoration Day'' and ''Fourth of July'', though none of these would be publicly performed before the 1930s.<ref>Swafford (1998), pp. 251, 252, 472, for descriptions; Sinclair (1999), passim, for proper dating of ''Scherzo: Over the Pavements'', ''Concord'' Sonata, and other named pieces: Second String Quartet (1911–13, prem. 1946, publ. 1954); ''Decoration Day'' (ca. 1912–13, rev. ca. 1923–24, prem. 1931, publ. 1962); ''Fourth of July'' (ca. 1911–13, rev. ca. 1931, publ./prem. 1932).</ref>
]
]
Writing about this passage, ] remarked on the "unprecedented ... level of dissonance at the boy's outcries. ... The voice has the ninth, pitched above, and the left hand has the seventh, pitched below. The result is a virtual 'tone cluster' ... the harmonic logic of these progressions, within the rules of composition Schubert was taught, can certainly be demonstrated. That logic, however, is not what appeals so strongly to the listener's imagination; rather it is the calculated impression (or illusion) of wild abandon."<ref>] (2010) ''The Oxford History of Western Music'', Volume 4, p. 149. ''Music in the Nineteenth Century'', Oxford University Press.</ref>

The concluding Arietta from ]’s last ], Op. 111 features a passage which, according to ] “gives a momentary touch of blurredness by the repeated cluster of fourths.” <ref>Cooper, M., ''Beethoven, the Last Decade''. Oxford University Press.</ref> ]]

The next known compositions after Charpentier's to feature tone clusters are ]'s "Une fusée" (A Rocket) Op. 55, published in 1859, and his "Les Diablotins" (The Imps), a miniature from the set of 49 '']'' (sketches) for solo piano, published in 1861.{{citation needed|date=May 2015}} ]]]

There is also the solo piano piece ''Battle of Manassas'', written in 1861 by ] and published in 1866. The score instructs the pianist to represent cannon fire at various points by striking "with the flat of the hand, as many notes as possible, and with as much force as possible, at the bass of the piano."<ref>Quoted in Altman (2004), p. 47.</ref> In 1887, ] became the first notable composer in the Western tradition to write an unmistakable chromatic cluster: the storm music with which '']'' opens includes an organ cluster (C, C{{music|sharp}}, D) that also has the longest notated duration of any scored musical texture known.<ref>Kimbell (1991), p. 606; "Earliest Usages: 1. Pitch" and "Duration and Rhythm: 2. Longest notated duration, including ties" in {{Webarchive|url=https://web.archive.org/web/20100308113537/http://www.informatics.indiana.edu/donbyrd/CMNExtremes.htm |date=2010-03-08 }}.</ref> The choral finale of ]'s ] features a tone cluster of great poignancy arising naturally out of ] to the words "wird, der dich rief, dir geben":
]
]

Still, it was not before the second decade of the twentieth century that tone clusters assumed a recognized place in Western classical music practice.

===In classical music of the early 1900s===
] was the first composer to be widely known for using tone clusters—though the term itself was not yet used to describe the radical aspect of his work.]]
]]]

"Around 1910," ] writes, "] was causing a stir by the near–tone clusters in such works as his ''Gumsuckers March.''"<ref>Schonberg (1987), p. 419.</ref> In 1911, what appears to be the first published classical composition to thoroughly integrate true tone clusters was issued: ''Tintamarre (The Clangor of Bells)'', by Canadian composer ] (1862–1913).{{efn|1=For a discussion of the piece, see {{cite web|author=Keillor, Elaine|url=http://www.collectionscanada.gc.ca/sheetmusic/028008-3200-e.html|title=Writing for a Market—Canadian Musical Composition Before the First World War|publisher=Library and Archives Canada/Bibliothèque et Archives Canada|date=2004-05-10|access-date=2011-08-29}} The of ''Tintamarre'' and its {{Dead link|date=November 2021 |bot=InternetArchiveBot |fix-attempted=yes }} are also available online via Library and Archives Canada/Bibliothèque et Archives Canada. See also Keillor (2000) and {{cite encyclopedia|url=https://www.thecanadianencyclopedia.ca/en/article/humfrey-anger-emc|title=Anger, Humfrey|publisher=]|encyclopedia=Encyclopedia of Music in Canada|access-date=2007-08-20}} The early performance history of ''Tintamarre'' has not been established.}}

Within a few years, the radical composer-pianist ] became one of the most famous figures in classical music on both sides of the Atlantic for his performances of cutting-edge work. In 1914, Ornstein debuted several of his own solo piano compositions: '']'' (aka ''Danse Sauvage''; {{circa}} 1913–14), ''Impressions of the Thames'' ({{circa}} 1913–14), and ''Impressions of Notre Dame'' ({{circa}} 1913–14) were the first works to explore the tone cluster in depth ever heard by a substantial audience. ''Wild Men's Dance'', in particular, was constructed almost entirely out of clusters ({{Audio|Ornstein-Wild Mens Dance.ogg|listen}}).{{efn|See Broyles (2004), p. 78, for premiere of these works. The piano music for Ornstein's Sonata for Violin and Piano, Op. 31 (1915; not 1913 as is often erroneously given), also employs tone clusters, though not to the extent of ''Wild Men's Dance''. ''Three Moods'' ({{circa}} 1914) for solo piano has been said to contain clusters (Pollack , p. 44); perusal online of the published score, however, does not reveal any. Ornstein's solo piano piece ''Suicide in an Airplane'' (n.d.), which makes incontrovertible use of tone clusters in one extended passage, is often erroneously dated "1913" or "{{circa}} 1913"; in fact, it is undated and there is no record of its existence before 1919 (Anderson ).}} In 1918, critic Charles L. Buchanan described Ornstein's innovation: " gives us masses of shrill, hard dissonances, chords consisting of anywhere from eight to a dozen notes made up of half tones heaped one upon another."<ref>Quoted in Chase (1992), p. 450.</ref>

Clusters were also beginning to appear in more pieces by European composers. ]'s use of them in '']'' (1905–1908) may have influenced ]'s subsequent piano writing.<ref>Nectoux (2004), p. 171.</ref> ] has suggested that the "dissonant star clusters" in its third and fourth books were particularly compelling to ], who called ''Iberia'' "the wonder of the piano".<ref>Horowitz (2010), p. 18.</ref> The ] score for ]'s stage show '']'' (1909) employs a chromatic cluster at two climactic points.<ref>Finney (1967), p. 74.</ref> ]'s Four Pieces for clarinet and piano (1913) calls for clusters along with other avant-garde keyboard techniques.<ref>Pino (1998), p. 258.</ref> ]'s Piano Prelude "]" makes powerful use of clusters to evoke the sound of "pealing bells – with so many added major seconds one would call this ] harmony".<ref>DeVoto, M. (2003, .p190) "The Debussy Sound", in Trezise, M. (ed.) ''The Cambridge Companion to Debussy''. Cambridge University Press.</ref>
]
]

In his 1913 piano prelude "General Lavine – Excentric", one of the first pieces to be influenced by black American popular styles (the ]) Debussy features abrasive tone clusters at the conclusion of the following passage:
]
]

In his 1915 arrangement for solo piano of his ''Six Epigraphes Antiques'' (1914), originally a set of piano duets, Debussy includes tone clusters in the fifth piece, .<ref>Hinson (1990), pp. 43–44.</ref>
]

Russian composer ] used them extensively in his ''Three Idylles'', Op. 50, written in 1913.{{Citation needed|date=March 2020}} ]'s '']'' (1915) "starts and ends with the setting sun—a B flat minor chord cluster slowly built down."<ref>W.S.M. (1958), p. 63.</ref>

Though much of his work was made public only years later, ] had been exploring the possibilities of the tone cluster—which he referred to as the "group chord"—for some time. In 1906–07, Ives composed his first mature piece to extensively feature tone clusters, ''Scherzo: Over the Pavements''.{{efn|1=Thomas B. Holmes (1985; 2002: p. 35{{Clarify|date=November 2015|reason=Which of the two editions is meant? The pagination is not the same in the two versions.}}) notes that the song ''Majority'' (aka ''The Masses''), written by Ives in 1888 at the age of fourteen, incorporates tone clusters in the piano accompaniment. He correctly describes this as "a rebellious act for a beginning composer". He errs in calling it "probably the first documented use of a tone cluster in a score". Swafford (1998) observes that Ives chose to begin his ''114 Songs'' (publ. 1922) with the work (pp. 227, 271, 325). And he too miscredits Ives with the "invention of the tone cluster" (p. 231). On the other hand, he valuably points to Ives's awareness that "tone clusters...had been there since time immemorial when large groups sang. The mistakes were part of the music" (p. 98).}} Orchestrated for a nine-piece ensemble, it includes both black- and white-note clusters for the piano.<ref>Nicholls (1991), p. 57.</ref> Revised in 1913, it would not be recorded and published until the 1950s and would have to wait until 1963 to receive its first public performance. During the same period that Ornstein was introducing tone clusters to the concert stage, Ives was developing a piece with what would become the most famous set of clusters: in the second movement, "Hawthorne", of the ] ({{circa}} 1904–1915, publ. 1920, prem. 1928, rev. 1947), mammoth piano chords require a wooden bar almost fifteen inches long to play.<ref>Reed (2005), p. 59; Swafford (1998), p. 262. The "Hawthorne" movement was based on the unfinished ''Hawthorne'' Concerto of 1910, from which it was recomposed largely in 1911–12. See Ives (1947), p. iii.</ref> The gentle clusters produced by the felt- or flannel-covered bar represent the sound of far-off church bells ({{Audio|Ives-Concord Sonata M2.ogg|listen}}).<ref>Shreffler (1991), p. 3; Hitchcock (2004), p. 2.</ref> Later in the movement, there are a series of five-note diatonic clusters for the right hand. In his notes to the score, Ives indicates that "these group-chords...may, if the player feels like it, be hit with the clenched fist."<ref>Ives (1947), p. 73. Ives's orthography was not consistent. When the term "group chord" is introduced earlier in the notes, it appears without a hyphen.</ref> Between 1911 and 1913, Ives also wrote ensemble pieces with tone clusters such as his Second String Quartet and the orchestral ''Decoration Day'' and ''Fourth of July'', though none of these would be publicly performed before the 1930s.{{efn|1=Swafford (1998), pp. 251, 252, 472, for descriptions; Sinclair (1999), ''passim'', for proper dating of ''Scherzo: Over the Pavements'', ''Concord'' Sonata, and other named pieces: Second String Quartet (1911–13, prem. 1946, publ. 1954); ''Decoration Day'' ({{circa}} 1912–13, rev. {{circa}} 1923–24, prem. 1931, publ. 1962); ''Fourth of July'' ({{circa}} 1911–13, rev. {{circa}} 1931, publ./prem. 1932).}}


===In the work of Henry Cowell=== ===In the work of Henry Cowell===
] was largely responsible for establishing the tone cluster in the lexicon of modern classical music.]] ] was largely responsible for establishing the tone cluster in the lexicon of modern classical music.]]
{{Listen|type=music|filename=Cowell-Tides of Manaunaun.ogg |title=''Tides of Manaunaun'' (1917) |description=The opening of Cowell's seminal piece}}
In June 1913, a sixteen-year-old Californian with no formal musical training wrote a solo piano piece, ''Adventures in Harmony'', employing "primitive tone clusters."<ref>Nicholls (1991), p. 134.</ref> ] would soon emerge as the seminal figure in promoting the cluster harmonic technique. Ornstein abandoned the concert stage in the early 1920s and, anyway, clusters had served him as practical harmonic devices, not as part of a larger theoretical mission. In the case of Ives, clusters comprised a relatively small part of his compositional output, much of which went unheard for years. For the intellectually ambitious Cowell—who heard Ornstein perform in New York in 1916—clusters were crucial to the future of music. He set out to explore their "overall, cumulative, and often programmatic effects."<ref>Broyles (2004), p. 342, n. 10.</ref>
In June 1913, a sixteen-year-old Californian with no formal musical training wrote a solo piano piece, ''Adventures in Harmony'', employing "primitive tone clusters".<ref>Nicholls (1991), p. 134.</ref> ] would soon emerge as the seminal figure in promoting the cluster harmonic technique. Ornstein abandoned the concert stage in the early 1920s and, anyway, clusters had served him as practical harmonic devices, not as part of a larger theoretical mission. In the case of Ives, clusters comprised a relatively small part of his compositional output, much of which went unheard for years. For the intellectually ambitious Cowell—who heard Ornstein perform in New York in 1916—clusters were crucial to the future of music. He set out to explore their "overall, cumulative, and often programmatic effects".<ref>Broyles (2004), p. 342, n. 10.</ref>


''Dynamic Motion'' (1916) for solo piano, written when Cowell was nineteen, has been described as "probably the first piece anywhere using secundal chords independently for musical extension and variation."<ref>Bartok et al. (1963), p. 14 (unpaginated).</ref> Though that is not quite accurate, it does appear to be the first piece to employ chromatic clusters in such a manner. A solo piano piece Cowell wrote the following year, '']'' (1917), would prove to be his most popular work and the composition most responsible for establishing the tone cluster as a significant element in Western classical music. (Cowell's early piano works are often erroneously dated; in the two cases above, as 1914 and 1912, respectively.<ref>Correct dating of Cowell's early works is per Hicks (2002), pp. 80, 85. Correct dating of Cowell's work in general is per the standard catalogue, Lichtenwanger (1986).</ref>) Assumed by some to involve an essentially random—or, more kindly, ]—pianistic approach, Cowell would explain that precision is required in the writing and performance of tone clusters no less than with any other musical feature: '']'' (1916) for solo piano, written when Cowell was nineteen, has been described as "probably the first piece anywhere using secundal chords independently for musical extension and variation."<ref>Bartók et al. (1963), p. 14 (unpaginated).</ref> Though that is not quite accurate, it does appear to be the first piece to employ chromatic clusters in such a manner. A solo piano piece Cowell wrote the following year, '']'' (1917), would prove to be his most popular work and the composition most responsible for establishing the tone cluster as a significant element in Western classical music. (Cowell's early piano works are often erroneously dated; in the two cases above, as 1914 and 1912, respectively.<ref>Correct dating of Cowell's early works is per Hicks (2002), pp. 80, 85. Correct dating of Cowell's work in general is per the standard catalogue, Lichtenwanger (1986).</ref>) Assumed by some to involve an essentially random—or, more kindly, ]—pianistic approach, Cowell would explain that precision is required in the writing and performance of tone clusters no less than with any other musical feature:
<blockquote> <blockquote>
Tone clusters...on the piano whole scales of tones used as chords, or at least three contiguous tones along a scale being used as a chord. And, at times, if these chords exceed the number of tones that you have fingers on your hand, it may be necessary to play these either with the flat of the hand or sometimes with the full forearm. This is not done from the standpoint of trying to devise a new piano technique, although it actually amounts to that, but rather because this is the only practicable method of playing such large chords. It should be obvious that these chords are exact and that one practices diligently in order to play them with the desired tone quality and to have them absolutely precise in nature.<ref>Cowell (1993), 12:16–13:14.</ref> Tone clusters...on the piano whole scales of tones used as chords, or at least three contiguous tones along a scale being used as a chord. And, at times, if these chords exceed the number of tones that you have fingers on your hand, it may be necessary to play these either with the flat of the hand or sometimes with the full forearm. This is not done from the standpoint of trying to devise a new piano technique, although it actually amounts to that, but rather because this is the only practicable method of playing such large chords. It should be obvious that these chords are exact and that one practices diligently in order to play them with the desired tone quality and to have them absolutely precise in nature.<ref>Cowell (1993), 12:16–13:14.</ref>
</blockquote> </blockquote>
Historian and critic ] describes the broad range of ways in which Cowell constructed (and thus performed) his clusters and used them as musical textures, "sometimes with a top note brought out melodically, sometimes accompanying a left-hand melody in parallel."<ref>{{cite web|author=Gann, Kyle|url=http://www.artsjournal.com/postclassic/2003/10/rosens_sins_of_american_omissi.html|title=Rosen's Sins of American Omission|work=ArtsJournal|date=]|accessdate=2007-08-18}}</ref> Historian and critic ] describes the broad range of ways in which Cowell constructed (and thus performed) his clusters and used them as musical textures, "sometimes with a top note brought out melodically, sometimes accompanying a left-hand melody in parallel."<ref>{{cite web|author=Gann, Kyle|url=http://www.artsjournal.com/postclassic/2003/10/rosens_sins_of_american_omissi.html|title=Rosen's Sins of American Omission|work=ArtsJournal|date=2003-10-21|access-date=2007-08-18}}</ref>


Beginning in 1921, with an article serialized in ''The Freeman'', an Irish cultural journal, Cowell popularized the term ''tone cluster''.<ref>Hicks (2002), pp. 106–108.</ref> While he did not coin the phrase, as is often claimed, he appears to have been the first to use it with its current meaning.<ref>See Seachrist (2003), p. 215, n. 15, for an example of a claim that the "term was invented by Henry Cowell." ''Tone cluster'' had been used with a different meaning since at least 1910 by music theorist and educator ]: referring to an example of three-part ], "there is some good chord-form at almost every accent, some harmonic tone-cluster towards which the parts unanimously lead" (''Exercises in Elementary Counterpoint'', 5th ed. , p. 111). See also his correspondence, "Schoenberg's 'Harmony,'" in ''The New Music Review and Church Music Review'', vol. 14, no. 168 (November 1915), p. 404: "I have regretted that I did not, in revising my 'Material,' lay still greater stress upon the accidental tone-clusters such as you illustrate"; "in Ex. 318, No. 5, you will find the Mozart tone-cluster which you give in your Ex. 11."</ref> During the 1920s and 1930s, Cowell toured widely through North America and Europe, playing his own experimental works, many built around tone clusters. In addition to ''The Tides of Manaunaun'', ''Dynamic Motion'', and its five "encores"—''What's This'' (1917), ''Amiable Conversation'' (1917), ''Advertisement'' (1917), ''Antinomy'' (1917, rev. 1959; frequently misspelled "Antimony"), and ''Time Table'' (1917)—these include ''The Voice of Lir'' (1920), ''Exultation'' (1921), ''The Harp of Life'' (1924), ''Snows of Fujiyama'' (1924), ''Lilt of the Reel'' (1930), and ''Deep Color'' (1938). ''Tiger'' (1930) has the single largest chord ever written for an individual instrument: 53 notes.<ref>"Other: 1. Vertical extremes" in Beginning in 1921, with an article serialized in ''The Freeman'', an Irish cultural journal, Cowell popularized the term ''tone cluster''.<ref>Hicks (2002), pp. 106–108.</ref> While he did not coin the phrase, as is often claimed, he appears to have been the first to use it with its current meaning.{{efn|1=See Seachrist (2003), p. 215, n. 15, for an example of a claim that the "term was invented by Henry Cowell". ''Tone cluster'' had been used with a different meaning since at least 1910 by music theorist and educator ] (n.d., 111): referring to an example of three-part ], "there is some good chord-form at almost every accent, some harmonic tone-cluster towards which the parts unanimously lead." See also his correspondence, "Schoenberg's 'Harmony,'" in ''The New Music Review and Church Music Review'', vol. 14, no. 168 (November 1915), p. 404: "I have regretted that I did not, in revising my 'Material', lay still greater stress upon the accidental tone-clusters such as you illustrate"; "in Ex. 318, No. 5, you will find the Mozart tone-cluster which you give in your Ex. 11."}} During the 1920s and 1930s, Cowell toured widely through North America and Europe, playing his own experimental works, many built around tone clusters. In addition to ''The Tides of Manaunaun'', ''Dynamic Motion'', and ]—''What's This'' (1917), ''Amiable Conversation'' (1917), ''Advertisement'' (1917), ''Antinomy'' (1917, rev. 1959; frequently misspelled "Antimony"), and ''Time Table'' (1917)—these include ''The Voice of Lir'' (1920), ''Exultation'' (1921), ''The Harp of Life'' (1924), ''Snows of Fujiyama'' (1924), ''Lilt of the Reel'' (1930), and ''Deep Color'' (1938). ''Tiger'' (1930) has a chord of 53 notes, probably the largest ever written for a single instrument until 1969.<ref>"Other: 1. Vertical extremes" in {{Webarchive|url=https://web.archive.org/web/20100308113537/http://www.informatics.indiana.edu/donbyrd/CMNExtremes.htm |date=2010-03-08 }}.</ref> Along with Ives, Cowell wrote some of the first large-ensemble pieces to make extensive use of clusters. ''The Birth of Motion'' ({{circa}} 1920), his earliest such effort, combines orchestral clusters with glissando.<ref>Yunwha Rao (2004), p. 245.</ref> "Tone Cluster", the second movement of Cowell's Concerto for Piano and Orchestra (1928, prem. 1978), employs a wide variety of clusters for the piano and each instrumental group ({{Audio|Cowell-Piano Concerto M1.ogg|listen}}).<ref>Zwenzner (2001), p. 13.</ref> From a quarter-century later, his Symphony No. 11 (1953) features a sliding chromatic cluster played by muted violins.<ref>Yunwha Rao (2004), p. 138.</ref>
.</ref> Along with Ives, Cowell wrote some of the first large-ensemble pieces to make extensive use of clusters. ''The Birth of Motion'' (ca. 1920), his earliest such effort, combines orchestral clusters with glissando.<ref>Yunwha Rao (2004), p. 245.</ref> "Tone Cluster," the second movement of Cowell's Concerto for Piano and Orchestra (1928, prem. 1978), employs a wide variety of clusters for the piano and each instrumental group.<ref>Zwenzner (2001), p. 13.</ref> From a quarter-century later, his Symphony No. 11 (1953) features a sliding chromatic cluster played by muted violins.<ref>Yunwha Rao (2004), p. 138.</ref>


In his theoretical work ''New Musical Resources'' (1930), a major influence on the classical avant-garde for many decades, Cowell argued that clusters should not be employed simply for color: In his theoretical work ''New Musical Resources'' (1930), a major influence on the classical avant-garde for many decades, Cowell argued that clusters should not be employed simply for color:
<blockquote> <blockquote>
In harmony it is often better for the sake of consistency to maintain a whole succession of clusters, once they are begun; since one alone, or even two, may be heard as a mere effect, rather than as an independent and significant procedure, carried with musical logic to its inevitable conclusion.<ref>Quoted in Gann (1997), p. 174.</ref> In harmony it is often better for the sake of consistency to maintain a whole succession of clusters, once they are begun; since one alone, or even two, may be heard as a mere effect, rather than as an independent and significant procedure, carried with musical logic to its inevitable conclusion.<ref>Quoted in Gann (1997), p. 174.</ref>
</blockquote> </blockquote>


===In later classical music=== ===In later classical music===
] and Henry Cowell met in December 1923. Early the next year, the great Hungarian composer wrote Cowell to ask whether he might adopt tone clusters without causing offense.]] ] and Henry Cowell met in December 1923. Early the next year, the Hungarian composer wrote Cowell to ask whether he might adopt tone clusters without causing offense.]]
In 1922, composer ], a friend of Cowell's, declared approvingly that the development of the tone cluster "imperilled existence" of "the musical unit, the note."<ref>Quoted in Hicks (2002), p. 108.</ref> While that threat was not to be realized, clusters began to appear in the works of a growing number of composers. Already, ] had written his ''Three Moods'' (aka ''Trois Esquisses''; 1920–21) for piano—its name an apparent homage to a piece of Leo Ornstein's—which includes a triple-] cluster.<ref>Pollack (2000), p. 44.</ref> The most renowned composer to be directly inspired by Cowell's demonstrations of his tone cluster pieces was ], who requested Cowell's permission to employ the method.<ref>Stevens (1993), p. 67.</ref> Bartók's ] (1926) and ] (1926), his first significant works after three years in which he produced little, both feature tone clusters. In the 1930s, Cowell's student ] utilized keyboard clusters in several works such as his Prelude for Grandpiano (1937).<ref>Miller and Lieberman (2004), pp. 10, 135.</ref> At least as far back as 1942, ], who also studied under Cowell, began writing piano pieces with cluster chords; ''In the Name of the Holocaust'', from December of that year, includes chromatic, diatonic, and pentatonic clusters.<ref>Salzman (1996), p. 3 (unpaginated).</ref> ]'s '']'' (1944), considered by many to be the most important solo piano piece of the first half of the twentieth century, employs clusters throughout.<ref>Meister (2006), p. 131–132.</ref> They would feature in numerous subsequent piano works, by a wide range of composers. ] and ] are among those who have employed them frequently. In 1922, composer ], a friend of Cowell's, declared approvingly that the development of the tone cluster "imperilled existence" of "the musical unit, the note".<ref>Quoted in Hicks (2002), p. 108.</ref> While that threat was not to be realized, clusters began to appear in the works of a growing number of composers. Already, ] had written his ''Three Moods'' (aka ''Trois Esquisses''; 1920–21) for piano—its name an apparent homage to a piece of Leo Ornstein's—which includes a triple-] cluster.<ref>Pollack (2000), p. 44.</ref> The most renowned composer to be directly inspired by Cowell's demonstrations of his tone cluster pieces was ], who requested Cowell's permission to employ the method.<ref>Stevens (1993), p. 67.</ref> Bartók's ], ], and the from the ] suite (all 1926), his first significant works after three years in which he produced little, extensively feature tone clusters.<ref>Steinberg (2000), p. 37; Satola (2005), pp. 85–86; Lampert and Somfai (1984), p. 60.</ref>


In the 1930s, Cowell's student ] utilized keyboard clusters in several works such as his Prelude for Grandpiano (1937).<ref>Miller and Lieberman (2004), pp. 10, 135.</ref> At least as far back as 1942, ], who also studied under Cowell, began writing piano pieces with cluster chords; ''In the Name of the Holocaust'', from December of that year, includes chromatic, diatonic, and pentatonic clusters.<ref>Salzman (1996), p. 3 (unpaginated).</ref> ]'s '']'' (1944), often described as the most important solo piano piece of the first half of the twentieth century, employs clusters throughout.<ref>Meister (2006), p. 131–132.</ref> They would feature in numerous subsequent piano works, by a range of composers. ]'s '']'' (1961) makes bold, rhetorical use of chromatic clusters, scaled in seven degrees of width, from three to thirty-six semitones, as well as ascending and descending cluster arpeggios and cluster glissandi.<ref>Harvey (1975), p. 43; Henck (1980), p. 17; Maconie (2005), p. 217.</ref> Written two decades later, his '']'' employs many of the same techniques, along with clusters that call for the pianist to sit down on the keyboard.<ref>Rigoni (2001), p. 53.</ref> ]'s ''Apparitions, Elegiac Songs, and Vocalises for Soprano and Amplified Piano'' (1979), a setting of verse by ], is filled with clusters, including an enormous one that introduces three of its sections.<ref>Kramer (2000), p. 137.</ref> The piano part of the second movement of ]'s song cycle ''Magabunda'' (1983) has perhaps the single largest chord ever written for an individual instrument: all 88 notes on the keyboard.<ref>"Other: 1. Vertical extremes" in {{Webarchive|url=https://web.archive.org/web/20100308113537/http://www.informatics.indiana.edu/donbyrd/CMNExtremes.htm |date=2010-03-08 }}.</ref>
While tone clusters are coventionally associated with the piano, and the solo piano repertoire in particular, they have also assumed important roles in compositions for chamber groups and larger ensembles. Robert Reigle identifies Croatian composer ]'s organ-and-violin ''Sonata Religiosa'' (1925), with its sustained chromatic clusters, as "a missing link between Ives and Ligeti]]."<ref>{{cite web|author=Reigle, Robert|url=http://www.lafolia.com/archive/reigle/reigle200204gems.html|title=Forgotten Gems|work=La Folia|date=April 2002|accessdate=2007-08-19}}</ref> Bartók employs both diatonic and chromatic clusters in his ] (1928).<ref>{{cite web|author=Trueman, Daniel|url=http://www.music.princeton.edu/~dan/rtv/chapter_1.pdf|title=Three "Classical" Violins and a Fiddle|publisher=Princeton University, Department of Music|work=Reinventing the Violin|date=1999|accessdate=2007-08-19}} See also Robin Stowell, "Extending the Technical and Expressive Frontiers," in ''The Cambridge Companion to the String Quartet'', ed. Stowell (Cambridge: Cambridge University Press, 2003; ISBN 0-521-80194-X), pp. 149–173; p. 162.</ref> The ] technique in such works as ]'s ] (1931) and ]'s '']'' (1955) is an elaboration of the tone cluster. In one of the most famous pieces associated with the sound mass aesthetic, ]'s '']'' (1959), for fifty-two string instruments, the quarter-tone clusters "see to have abstracted and intensified the features that define shrieks of terror and keening cries of sorrow."<ref>Hogan (2003), p. 179.</ref> In 1961, Ligeti wrote perhaps the largest cluster chord ever—in the orchestral ''Atmosphères'', every note in the ] over a range of five ]s is played at once (quietly). In ]'s choral ''Epitaph for Moonlight'' (1968), a tone cluster is constructed by dividing each choir section (soprano/alto/tenor/bass) into four parts. Each hums a note one semitone lower than the note hummed by the previous section, until all sixteen parts are contributing to the cluster.<ref>Swift (1972), pp. 511–512.</ref> In ]'s ''Rothko Chapel'' (1971), "Wordless vocal tone clusters seep out through the skeletal arrangements of viola, celeste, and percussion."<ref>{{cite web|author=Swan, Glenn|url=http://www.windowsmedia.com/MediaGuide/Templates/AlbumInfo.aspx?a_id=R%20%20%20201863|title=''Morton Feldman: Rothko Chapel (1971) for Chorus, Viola and Percussion/Why Patterns? (1978)'' (review)|publisher=WindowsMedia|work=All Music Guide|accessdate=2007-08-18}}</ref> ]'s chamber ensemble piece ''Ceremonial'' (1973) evokes both Verdi and Ives, combining the original extended-duration and mass cluster concepts: a weighted wooden board placed on an electric ] maintains a tone cluster throughout the work.<ref>Hinson and Roberts (2006), p. 624.</ref> Judith Bingham's ''Prague'' (1995) gives a brass band the opportunity to create tone clusters.<ref>{{cite web|author=Hindmarsh, Paul|url=http://www.4barsrest.com/articles/2002/art274.asp|title=The Regional Test Pieces 2003|publisher=4barsrest.com|accessdate=2007-08-19}}</ref> Keyboard clusters are set against orchestral forces in piano concertos such as ]'s first (1969) and ]'s (2007), the latter suggestive of Messiaen.<ref>Tommasini (2007).</ref> The choral compositions of ] often employ clusters.<ref>{{cite web|url=http://www.a-cappella.com/product/5068/classical-byusingers|title=''Brigham Young Univ. Singers: Eric Whitacre: Complete A Cappella Works'' (review)|publisher=a-capella.com|date=2002|accessdate=2008-02-25}} {{cite web|author=Paulin, Scott|url=http://music.barnesandnoble.com/search/product.asp?ean=34571175430|title=''Whitacre: Cloudburst and Other Choral Works'' (review)|publisher=Barnes & Noble|date=2006|accessdate=2008-02-25}}</ref>


While tone clusters are conventionally associated with the piano, and the solo piano repertoire in particular, they have also assumed important roles in compositions for chamber groups and larger ensembles. Robert Reigle identifies Croatian composer ]'s organ-and-violin ''Sonata Religiosa'' (1925), with its sustained chromatic clusters, as "a missing link between Ives and Ligeti]]."<ref>{{cite web|author=Reigle, Robert|url=http://www.lafolia.com/archive/reigle/reigle200204gems.html|title=Forgotten Gems|work=La Folia|date=April 2002|access-date=2007-08-19}}</ref> Bartók employs both diatonic and chromatic clusters in his ] (1928).<ref>{{harvnb|Trueman|1999}}. See also Robin Stowell, "Extending the Technical and Expressive Frontiers," in '']'', ed. Stowell (Cambridge: Cambridge University Press, 2003; {{ISBN|0-521-80194-X}}), pp. 149–173; p. 162.</ref> The ] technique in such works as ]'s ] (1931) and ]'s '']'' (1955) is an elaboration of the tone cluster. "Unlike most tonal and non-tonal linear dissonances, tone clusters are essentially static. The individual pitches are of secondary importance; it is the sound mass that is foremost."<ref>Reisberg, Horace (1975). "The Vertical Dimension", ''Aspects of 20th Century Music'', p.355. Wittlich, Gary; ed. Prentice-Hall. {{ISBN|0130493465}}.</ref> In one of the most famous pieces associated with the sound mass aesthetic, containing, "one of the largest clustering of individual pitches that has been written",<ref>Reisberg (1975), p.358.</ref> ]'s '']'' (1959), for fifty-two string instruments, the ] clusters "see to have abstracted and intensified the features that define shrieks of terror and keening cries of sorrow."<ref>Hogan (2003), p. 179.</ref> Clusters appear in two sections of the electronic music of Stockhausen's '']'' (1958–1960)—first as "hammering points...very difficult to synthesize", according to Robin Maconie, then as glissandi.<ref>Maconie (2005), p. 217.</ref> In 1961, Ligeti wrote perhaps the largest cluster chord ever—in the orchestral '']'', every note in the chromatic scale over a range of five ]s is played at once (quietly).<ref>Steinitz (2003), p.&nbsp;108.</ref> Ligeti's organ works make extensive use of clusters. ''Volumina'' (1961–62), graphically notated, consists of static and mobile cluster masses, and calls on many advanced cluster-playing techniques.<ref>Steinitz (2003), pp. 124–126; Herchenröder (2002), p. 303.</ref>
Three composers who made frequent use of tone clusters for a wide variety of ensembles are ], ]—both of whom often worked with them in microtonal contexts—and Lou Harrison. Scelsi employed them for much of his career, including in his last large-scale work, ''Pfhat'' (1974), which premiered in 1986.<ref>Halbreich (1988), pp. 9, 11 (unpaginated).</ref> They are found in works of Schnittke's ranging from the Quintet for Piano and Strings (1972–76), where "microtonal strings fin tone clusters between the cracks of the piano keys,"<ref>{{cite web|author=Drury, Stephen|url=http://www.callithumpian.org/html/news/fund05.htm|title=Callithumpian Consort Announces March Fund Rasing Concert at West Roxbury's Theodore Parker Church|publisher=Callithumpian Consort|date=]|accessdate=2007-08-18}}</ref> to the choral ''Psalms of Repentance'' (1988). Harrison's many pieces featuring clusters include ''Pacifika Rondo'' (1963), Concerto for Organ with Percussion (1973), Piano Concerto (1983–85), Three Songs for male chorus (1985), Grand Duo (1988), and ''Rhymes with Silver'' (1996).<ref>Miller and Lieberman (2004), pp. 10, 99, 135, 155.</ref> With his partner ], Harrison developed a device to facilitate high-speed keyboard cluster performance:

<blockquote>
The eighth movement of Messiaen's ] '']'' (1965–1969) features "a shimmering halo of tone-cluster glissandi" in the strings, evoking the "bright cloud" to which the narrative refers ({{Audio|Messiaen-Transfiguration M8.ogg|listen}}).<ref>Smither (2000), p. 674.</ref> Orchestral clusters are employed throughout Stockhausen's '']'' (1969) and '']'' (1971).<ref name="Maconie 2005, p. 338">Maconie (2005), p. 338.</ref> In ]'s ''Rothko Chapel'' (1971), "Wordless vocal tone clusters seep out through the skeletal arrangements of viola, celeste, and percussion."<ref>{{cite web|author=Swan, Glenn|url=http://www.windowsmedia.com/MediaGuide/Templates/AlbumInfo.aspx?a_id=R%20%20%20201863|archive-url=https://web.archive.org/web/20070930194316/http://www.windowsmedia.com/MediaGuide/Templates/AlbumInfo.aspx?a_id=R%20%20%20201863|url-status=dead|archive-date=2007-09-30|title=''Morton Feldman: Rothko Chapel (1971) for Chorus, Viola and Percussion/Why Patterns? (1978)'' (review)|publisher=WindowsMedia|work=Allmusic|access-date=2007-08-18 }}</ref> ]'s chamber ensemble piece ''Ceremonial'' (1973) evokes both Verdi and Ives, combining the original extended-duration and mass cluster concepts: a weighted wooden board placed on an electric ] maintains a tone cluster throughout the work.<ref name=HR624/> Judith Bingham's ''Prague'' (1995) gives a brass band the opportunity to create tone clusters.<ref>{{cite web|author=Hindmarsh, Paul|url=http://www.4barsrest.com/articles/2002/art274.asp|title=The Regional Test Pieces 2003|publisher=4barsrest.com|access-date=2007-08-19}}</ref> Keyboard clusters are set against orchestral forces in piano concertos such as ]'s first (1969) and ]'s (2007), the latter suggestive of Messiaen.<ref>Tommasini (2007).</ref> The choral compositions of ] often employ clusters, as a trademark of his style.<ref>Larson (2006), p. 23</ref><ref>{{cite web |url=http://www.a-cappella.com/product/5068/classical-byusingers |title=''Brigham Young Univ. Singers: Eric Whitacre: Complete A Cappella Works'' (review) |publisher=a-capella.com |year=2002 |access-date=2008-02-25 |archive-url=https://web.archive.org/web/20080209211548/http://www.a-cappella.com/product/5068/classical-byusingers |archive-date=2008-02-09 |url-status=dead }} {{cite web |author=Paulin, Scott |url=http://music.barnesandnoble.com/search/product.asp?ean=34571175430 |title=''Whitacre: Cloudburst and Other Choral Works'' (review) |publisher=Barnes & Noble |year=2006 |access-date=2008-02-25 }}{{Dead link|date=August 2024 |bot=InternetArchiveBot |fix-attempted=yes }}</ref> Whitacre's chord clusters are fundamentally based around ] and not easily interpretable by traditional harmonic analysis.<ref>Larson (2006), pp. 23–24</ref>
the "octave bar," a flat wooden device approximately two inches high with a grip on top and sponge rubber on the bottom, with which the player strikes the keys. Its length spans an octave on a grand piano. The sponge rubber bottom is sculpted so that its ends are slightly lower than its center, making the outer tones of the octave sound with greater force than the intermediary pitches. The pianist can thus rush headlong through fearfully rapid passages, precisely spanning an octave at each blow.<ref>Miller and Lieberman (2004), p. 135.</ref>

</blockquote>
Three composers who made frequent use of tone clusters for a wide variety of ensembles are ], ]—both of whom often worked with them in microtonal contexts—and Lou Harrison. Scelsi employed them for much of his career, including in his last large-scale work, ''Pfhat'' (1974), which premiered in 1986.<ref>Halbreich (1988), pp. 9, 11 (unpaginated).</ref> They are found in works of Schnittke's ranging from the Quintet for Piano and Strings (1972–1976), where "microtonal strings fin tone clusters between the cracks of the piano keys",<ref>{{cite web|author=Drury, Stephen|url=http://www.callithumpian.org/html/news/fund05.htm |title=Callithumpian Consort Announces March Fund Rasing Concert at West Roxbury's Theodore Parker Church|publisher=Callithumpian Consort|date=2005-02-15|access-date=2009-06-03 |archive-url = https://web.archive.org/web/20070928060034/http://www.callithumpian.org/html/news/fund05.htm |archive-date = 2007-09-28}}</ref> to the choral ''Psalms of Repentance'' (1988). Harrison's many pieces featuring clusters include ''Pacifika Rondo'' (1963), Concerto for Organ with Percussion (1973), Piano Concerto (1983–1985), Three Songs for male chorus (1985), Grand Duo (1988), and ''Rhymes with Silver'' (1996).<ref>Miller and Lieberman (2004), pp. 10, 99, 135, 155.</ref>


===In jazz=== ===In jazz===
] wrote the first known published composition to include a musical sequence built around specifically notated tone clusters.]] ] wrote the first known published composition to include a musical sequence built around specifically notated tone clusters.]]
Tone clusters have been employed by ] artists in a variety of styles, since the very beginning of the form. Around the turn of the twentieth century, ] pianist ] began performing a ] adaptation of a French ], introducing large chromatic tone clusters played by his left forearm. The growling effect led to Morton dubbing the piece his "Tiger Rag."<ref>Lomax (2001), pp. 66–69; Spaeth (1948), p. 420.</ref> In 1909, ]'s deliberately experimental "Wall Street Rag" included a section prominently featuring notated tone clusters—apparently the first published work in the history of Western music to do so.<ref>See Floyd (1995), p. 72; Berlin (1994), p. 187.</ref> The fourth of ]'s ''Pastime Rags'' (1913–20) features dissonant right-hand clusters.<ref>Magee (1998), p. 402.</ref> ], in pieces such as "Introspection" (1946) and "Off Minor" (1947), uses clusters as dramatic figures within the central improvisation and to accent the tension at its conclusion.<ref>Meadows (2003), ch. 10.</ref> They are heard on ]'s "Mr. Freddy Blues" (1950), undergirding the ].<ref>Harrison (1997), p. 315.</ref> By 1953, ] was employing piano tone clusters and dissonance in a manner anticipating the style ] pioneer ] would soon develop.<ref>{{cite web|url=http://www.jazzimprov.com/links/legends.cfm?legend_id=4|title=Jazz Legends: Dave Brubeck|work=Jazz Improv|accessdate=2007-08-18}}</ref> The approach of ] pianist ] is an even clearer antecedent to Taylor's use of clusters.<ref>Hazell (1997); Litweiler (1990), p. 202. See also Watrous (1989).</ref> During the same era, clusters appear as punctuation marks in the lead lines of ].<ref>Litweiler (1990), p. 23.</ref> In "The Gig" (1955), described by Francis Davis as Nichols's masterpiece, "clashing notes and tone clusters depic a pickup band at odds with itself about what to play."<ref>Davis (2004), p. 78.</ref> Recorded examples of ]'s piano cluster work include "Summertime" (1961) and '']'' (1967).<ref>{{cite web|author=Blumenfeld, Larry/Szwed, John F. (ed. Gary Giddins)|url=http://www.villagevoice.com/news/9923,jazzsupp,6308,1.html|title=Rockin' in Rhythm|work=Village Voice|date=]|accessdate=2007-08-20}}</ref> Tone clusters have been employed by ] artists in a variety of styles, since the very beginning of the form. Around the turn of the twentieth century, ] pianist ] began performing a ] adaptation of a French ], introducing large chromatic tone clusters played by his left forearm. The growling effect led Morton to dub the piece his "Tiger Rag" ({{Audio|Morton-Tiger Rag.ogg|listen}}).<ref>Lomax (2001), pp. 66–69; Spaeth (1948), p. 420.</ref> In 1909, ]'s deliberately experimental "Wall Street Rag" included a section prominently featuring notated tone clusters.<ref>See Floyd (1995), p. 72; Berlin (1994), p. 187.</ref>
]
]


The fourth of ]'s ''Pastime Rags'' (1913–1920) features dissonant right-hand clusters.<ref>Magee (1998), p. 402.</ref> ], in pieces such as (1962), "Introspection" (1946) and "Off Minor" (1947), uses clusters as dramatic figures within the central improvisation and to accent the tension at its conclusion.<ref>Meadows (2003), ch. 10.</ref> They are heard on ]'s "Mr. Freddy Blues" (1950), undergirding the ].<ref>Harrison (1997), p. 315.</ref> By 1953, ] was employing piano tone clusters and dissonance in a manner anticipating the style ] pioneer ] would soon develop.<ref>{{cite web|url=http://www.jazzimprov.com/links/legends.cfm?legend_id=4|title=Jazz Legends: Dave Brubeck|work=Jazz Improv|access-date=2007-08-18 |archive-url = https://web.archive.org/web/20070418205405/http://jazzimprov.com/links/legends.cfm?legend_id=4 |archive-date = April 18, 2007}}</ref> The approach of ] pianist ] is an even clearer antecedent to Taylor's use of clusters.<ref>Hazell (1997); Litweiler (1990), p. 202. See also Watrous (1989).</ref> During the same era, clusters appear as punctuation marks in the lead lines of ].<ref>Litweiler (1990), p. 23.</ref> In "The Gig" (1955), described by Francis Davis as Nichols's masterpiece, "clashing notes and tone clusters depic a pickup band at odds with itself about what to play."<ref>Davis (2004), p. 78.</ref> Recorded examples of ]'s piano cluster work include "Summertime" (1961) and '']'' (1967) and , his tribute to a former bass player, recorded in 1972 with bassist ].<ref>{{cite web|author1=Blumenfeld, Larry|author2=]|editor=]|url=http://www.villagevoice.com/1999-06-08/news/rockin-in-rhythm/|title=Rockin' in Rhythm|work=]|date=June 15, 1999|access-date=2009-06-03}}</ref> ]' interpretation of "]" from the album '']'' (1960), opens with a striking .<ref>Lee, W. F. (2002, p. 6) ''Bill Evans Piano interpretations''. Hal Leonard.</ref>
In jazz, as in classical music, tone clusters have not been restricted to the keyboard. In the 1930s, the ]'s "Stratosphere" included ensemble clusters among an array of progressive elements.<ref>Determeyer (2006), p. 78.</ref> The ]'s April 1947 recording of "If I Could Be With You One Hour Tonight," arranged by ], features a dramatic four-note trombone cluster at the end of the second chorus.<ref>{{cite web|author=Vosbein, Terry|url=http://www.vosbein.com/rugolo.html|title=Pete Rugolo and Progressive Jazz|publisher=Self-published (scholarly paper by established composer and educator presented at the IAJE International Conference, Chicago)|date=January 2002|accessdate=2007-08-17}}</ref> As described by critic Fred Kaplan, a 1950 performance by the Duke Ellington Orchestra features arrangements with the collective "blowing rich, dark, tone clusters that evoke Ravel."<ref>{{cite web|author=Kaplan, Fred|url=http://www.slate.com/Default.aspx?id=2111310&|title=All That Jazz: The Year's Best Records|work=Slate|date=]|accessdate=2007-08-18}}</ref> In the early 1960s, arrangements by ] and ] for Mulligan's Concert Jazz Band employed tone clusters in a dense style bringing to mind both Ellington and Ravel.<ref>{{cite web|author=Kaplan, Fred|url=http://www.avguide.com/film-music/music/musicreviews/tas146/146-jazz-caps.new.php|title=Jazz Capsules: ''The Complete Verve Gerry Mulligan Concert Band Sessions''|publisher=AVguide.com|date=2003|accessdate=2007-08-18}}</ref> The "tart tone cluster" that "pierces a song's surfaces and penetrates to its heart" has been called a specialty of guitarist ]'s.<ref>Palmer (1986).</ref>


In jazz, as in classical music, tone clusters have not been restricted to the keyboard. In the 1930s, the ]'s "Stratosphere" included ensemble clusters among an array of progressive elements.<ref>Determeyer (2006), p. 78.</ref> The ]'s April 1947 recording of "If I Could Be With You One Hour Tonight", arranged by ], features a dramatic four-note trombone cluster at the end of the second chorus.<ref>{{cite web|author=Vosbein, Terry|url=http://www.vosbein.com/rugolo.html|title=Pete Rugolo and Progressive Jazz|publisher=Self-published (scholarly paper by established composer and educator presented at the IAJE International Conference, Chicago)|date=January 2002|access-date=2007-08-17|archive-url=https://web.archive.org/web/20070912140200/http://www.vosbein.com/rugolo.html|archive-date=2007-09-12|url-status=dead}}</ref> As described by critic ], a 1950 performance by the Duke Ellington Orchestra features arrangements with the collective "blowing rich, dark, tone clusters that evoke Ravel".<ref>{{cite web|author=Kaplan, Fred|author-link=Fred Kaplan (journalist)|url=http://www.slate.com/Default.aspx?id=2111310&|title=All That Jazz: The Year's Best Records|work=Slate|date=2004-12-22|access-date=2007-08-18|archive-date=2007-09-30|archive-url=https://web.archive.org/web/20070930203734/http://www.slate.com/Default.aspx?id=2111310&|url-status=dead}}</ref> Chord clusters also feature in the scores of arranger ]. In his characteristically imaginative arrangement of ]'s "There's a boat that's leaving soon for New York" from the album '']'', Evans contributes chord clusters orchestrated on flutes, alto saxophone and muted trumpets as a background to accompany ]' solo . In the early 1960s, arrangements by ] and ] for Mulligan's Concert Jazz Band employed tone clusters in a dense style bringing to mind both Ellington and Ravel.<ref>{{cite web|author=Kaplan, Fred|url=http://www.avguide.com/film-music/music/musicreviews/tas146/146-jazz-caps.new.php |title=Jazz Capsules: ''The Complete Verve Gerry Mulligan Concert Band Sessions''|publisher=AVguide.com|year=2003|access-date=2009-06-03 |archive-url = https://web.archive.org/web/20071221033642/http://www.avguide.com/film-music/music/musicreviews/tas146/146-jazz-caps.new.php |archive-date = 2007-12-21}}</ref> ]'s bass clarinet solos would often feature "microtonal clusters summoned by frantic overblowing".<ref>Weinstein (1993), p. 84.</ref> Critic ] called the "tart tone cluster" that "pierces a song's surfaces and penetrates to its heart" a specialty of guitarist ]'s.<ref>Palmer (1986).</ref>
Clusters are especially prevalent in the realm of free jazz. Cecil Taylor has used them extensively as part of his improvisational method since the mid-1950s.<ref>Litweiler (1990), p. 202. See also Anderson (2006), pp. 57–58.</ref> Like much of his musical vocabulary, his clusters operate "on a continuum somewhere between melody and percussion."<ref>Pareles (1988).</ref> One of Taylor's primary purposes in adopting clusters was to avoid the dominance of any specific pitch.<ref>Anderson (2006), p. 111.</ref> Leading free jazz composer, bandleader, and pianist ] often used them to rearrange the musical furniture, as described by scholar John F. Szwed:

Clusters are especially prevalent in the realm of free jazz. Cecil Taylor has used them extensively as part of his improvisational method since the mid-1950s.<ref>Litweiler (1990), p. 202. See also Anderson (2006), pp. 57–58.</ref> Like much of his musical vocabulary, his clusters operate "on a continuum somewhere between melody and percussion".<ref>Pareles (1988).</ref> One of Taylor's primary purposes in adopting clusters was to avoid the dominance of any specific pitch.<ref>Anderson (2006), p. 111.</ref> Leading free jazz composer, bandleader, and pianist ] often used them to rearrange the musical furniture, as described by scholar ]:
<blockquote> <blockquote>
When he sensed that piece needed an introduction or an ending, a new direction or fresh material, he would call for a space chord, a collectively improvised tone cluster at high volume which "would suggest a new melody, maybe a rhythm." It was a pianistically conceived device which created another context for the music, a new mood, opening up fresh tonal areas.<ref>Szwed (1998), p. 214.</ref> When he sensed that piece needed an introduction or an ending, a new direction or fresh material, he would call for a space chord, a collectively improvised tone cluster at high volume which "would suggest a new melody, maybe a rhythm." It was a pianistically conceived device which created another context for the music, a new mood, opening up fresh tonal areas.<ref>Szwed (1998), p. 214.</ref>
</blockquote> </blockquote>
As free jazz spread in the 1960s, so did the use of tone clusters. In comparison with what John Litweiler describes as Taylor's "endless forms and contrasts," the solos of ] employ tone clusters in a similarly free, but more lyrical, flowing context.<ref>Litweiler (1990), p. 182.</ref> Guitarist ] made them a central part of his improvisations, executing "glass-shattering tone clusters that sounded like someone was ripping the pickups out of the guitar without having bothered to unplug it from its overdriven amplifier."<ref>Palmer (1991).</ref> Pianist ] has been another major free jazz proponent of the tone cluster, frequently in collaboration with ], who played with Abrams early in his career.<ref>Enstice and Stockhouse (2004), p. 81.</ref> Since the 1990s, ] has built on Taylor's innovations with the form.<ref>Weinstein (1996).</ref> European free jazz pianists who have contributed to the development of the tone cluster palette include ] and ].<ref>{{cite web|author=Svirchev, Laurence|url=http://www.jazzhouse.org/library/?read=svirchev11|title="If You Start from Point-Zero, You Have to Imagine Something": An Interview with Alexander von Schlippenbach|publisher=Jazz Journalists Association Library|date=2006|accessdate=2007-08-17}}</ref> As free jazz spread in the 1960s, so did the use of tone clusters. In comparison with what John Litweiler describes as Taylor's "endless forms and contrasts", the solos of ] employ tone clusters in a similarly free, but more lyrical, flowing context.<ref>Litweiler (1990), p. 182.</ref> Guitarist ] made them a central part of his improvisations; in Palmer's description, he executed "glass-shattering tone clusters that sounded like someone was ripping the pickups out of the guitar without having bothered to unplug it from its overdriven amplifier."<ref>Palmer (1991).</ref> Pianist ] has been another major free jazz proponent of the tone cluster, frequently in collaboration with ], who played with Abrams early in his career.<ref>Enstice and Stockhouse (2004), p. 81.</ref> Since the 1990s, ] has built on Taylor's innovations with the form.<ref>Weinstein (1996).</ref> European free jazz pianists who have contributed to the development of the tone cluster palette include ] and ].<ref>{{cite web|author=Svirchev, Laurence|url=http://www.jazzhouse.org/library/?read=svirchev11|title="If You Start from Point-Zero, You Have to Imagine Something": An Interview with Alexander von Schlippenbach|publisher=Jazz Journalists Association Library|year=2006|access-date=2007-08-17}}</ref>


], who bridged free and mainstream jazz, "had a technique of rolling his wrists as he improvised—the outside edges of his hands became scarred from it—to create moving tone clusters. Building up from ]s, he could create eddies of noise on the keyboard...like concise Cecil Taylor outbursts."<ref>Ratliff (2002), p. 205.</ref> ] employs tone clusters as keyboardist for ], which mixes free jazz elements into its ]/] style.<ref>Pareles (2000).</ref> ], who bridged free and mainstream jazz, "had a technique of rolling his wrists as he improvised—the outside edges of his hands became scarred from it—to create moving tone clusters", writes critic Ben Ratliff. "Building up from ]s, he could create eddies of noise on the keyboard...like concise Cecil Taylor outbursts."<ref name=R205/> In the description of ], Pullen "uniquely melodized cluster playing and made it tonal. He phrases impulsively raw clusters with his right hand and yet embeds them in clear, harmonically functional tonal chords simultaneously played with the left hand."<ref>Berendt (1992), p. 287.</ref> ] employs tone clusters as keyboardist for ], which mixes free jazz elements into its ]/] style.<ref>Pareles (2000).</ref>


===In popular music=== ===In popular music===
Like jazz, ] has made use of tone clusters since its birth, if characteristically in a less deliberate manner—most famously, ]'s live-performance piano technique of the 1950s, involving fists, arms, flying feet, and derrière. On ]'s "]," recorded in September 1967, organist ] uses tone clusters within the context of a ]; the song is apparently the closest approximation on record of the band's early live sound.<ref>Schwartz (1996), pp. 97, 94.</ref> Around the same time, ] keyboardist ] began introducing clusters into his solos during live performances of the band's hit "]."<ref>Hicks (1999), p. 88.</ref> ]'s self-titled 1970 ] employs organ clusters to add variety to its repeated tape sequences.<ref>Bussy (2004), p. 31.</ref> Composers and arrangers such as ], ], ], and ] have used clusters for variety in commercial work and they are employed often in the ] of horror and science-fiction films.<ref>Corozine (2002), p. 11. For a discussion of the use of tone clusters in film scoring, see David Huckvale, "''Twins of Evil'': An Investigation into the Aesthetics of Film Music," ''Popular Music'', vol. 9, no. 1 (January 1990), pp. 1–35. For a description of their role in two individual films, see Shuhei Hosokawa, "Atomic Overtones and Primitive Undertones: Akira Ifukube's Sound Design for ''Godzilla''," in ''Off the Planet: Music, Sound and Science Fiction Cinema'', ed. Philip Hayward (Eastleigh, UK: John Libbey Publ., 2004; ISBN 0-86196-644-9), pp. 42–60; n. 21, p. 60; and, for ''Close Encounters'', Neil Lerner, "Nostalgia, Masculinist Discourse, and Authoritarianism in John Williams' Scores for ''Star Wars'' and ''Close Encounters of the Third Kind''," in ''Off the Planet'', pp. 96–107; 105–106.</ref> Like jazz, ] has made use of tone clusters since its birth, if characteristically in a less deliberate manner—most famously, ]'s live-performance piano technique of the 1950s, involving fists, feet, and derrière.<ref>Tyler (2008), p. 76; Morrison (1998), p. 95.</ref> Since the 1960s, much ], which crosses the lines between rock, ], and ], has been based on tone clusters. On ]'s "]", recorded in September 1967, organist ] uses tone clusters within the context of a ]; the song is apparently the closest approximation on record of the band's early live sound.<ref>Schwartz (1996), pp. 97, 94.</ref> Around the same time, ] keyboardist ] began introducing clusters into his solos during live performances of the band's hit "]".<ref>Hicks (1999), p. 88.</ref>

]'s self-titled 1970 ] employs organ clusters to add variety to its repeated tape sequences.<ref>Bussy (2004), p. 31.</ref> In 1971, critic ] lauded the "tone-cluster vocal harmonies" created by ]'s three lead singers, ], ], and ].<ref>Quoted in Brackett (2002), p. 217.</ref> ]'s 1972 double album '']'' is replete with clusters performed on synthesizer.<ref>Patterson (2001), p. 505.</ref> The ]' 1965 song "]" features a momentarily grating tone cluster with voices singing A sharp and C sharp against the accompanying keyboard playing a sustained chord on B to the word "time".<ref>"We can work it out" (1986, p.990, bar 7) ''The Beatles Complete Scores''. Hal Leonard</ref> ]'s 1968 song "]" from their debut album '']'' features a dissonant vocal refrain with ]s culminating in a 3-note cluster to the words "you put the load right on me."

The sound of tone clusters played on the organ became a convention in ] for dreams.<ref name="Maconie 2005, p. 338"/> Clusters are often used in the ] of horror and science-fiction films.{{efn|1=For a discussion of the use of tone clusters in film scoring, see Huckvale 1990, pp. 1–35. For descriptions of their role in three individual films, Hosokawa 2004, p. 60n21; for ''To the Devil a Daughter'', Huckvale 2008, pp. 179–181 ; and, for ''Close Encounters'', Neil Lerner, "Nostalgia, Masculinist Discourse, and Authoritarianism in John Williams' Scores for ''Star Wars'' and ''Close Encounters of the Third Kind''," in ''Off the Planet'', pp. 96–107; 105–106.}} For a 2004 production of the play ''Tone Clusters'' by ], composer ]—a member of the indie rock bands ] and ]—employed clusters to "subtly build the tension", in contrast to what he perceived in the cluster pieces by Cowell and Ives suggested by Oates: "Some of it was like music to murder somebody to; it was like horror-movie music."{{sfn|Chandler|2004}}


==Use in other music== ==Use in other music==
In traditional Japanese '']'', the imperial court music, a tone cluster performed on '']'' (a type of ]) is generally employed as a ].<ref>Malm (2000), pp. 116–117.</ref> Lou Harrison's ''Pacifika Rondo'', which mixes Eastern and Western instrumentation and styles, mirrors this approach—sustained organ clusters emulate the sound and function of the ''shõ''.<ref>Miller and Lieberman (2004), p. 155.</ref> ] folk musicians employ a mouth organ that similarly produces tone clusters.<ref>''Musical Courier'' 164 (1962), p. 12.</ref> The characteristic musical form played on the ''bin-baja'', a strummed harp of ]'s Pardhan people, has been described as a "rhythmic ] on a tone cluster."<ref>Knight (1985).</ref> In traditional Japanese '']'', the imperial court music, a tone cluster performed on '']'' (a type of ]) is generally employed as a ].<ref>Malm (2000), pp. 116–117.</ref> ], active from the late 1920s to the early 2000s, merged ''gagaku''{{'}}s harmonies and tonalities with avant-garde Western techniques. Much of his work is built on the ''shō''{{'}}s ten traditional cluster formations.<ref>Herd (2008), pp. 373–374.</ref> Lou Harrison's ''Pacifika Rondo'', which mixes Eastern and Western instrumentation and styles, mirrors the ''gagaku'' approach—sustained organ clusters emulate the sound and function of the ''shō''.<ref>Miller and Lieberman (2004), p. 155.</ref> The ''shō'' also inspired ] in creating the instrumental texture of his 1964 dramatic church parable '']''. Its sound pervades the characteristically sustained cluster chords played on a .<ref>Cooke, M. (1999, p. 183) "Distant Horizons", in ''The Cambridge Companion to Benjamin Britten''. Cambridge University Press.</ref> Traditional Korean court and aristocratic music employs passages of simultaneous ornamentation on multiple instruments, creating dissonant clusters; this technique is reflected in the work of twentieth-century Korean German composer ].<ref>Howard (2006), p. 152.</ref>


Several East Asian ], including the ''shō'', were modeled on the '']'', an ancient Chinese folk instrument later incorporated into more formal musical contexts. ''Wubaduhesheng'', one of the traditional chord formations played on the ''sheng'', involves a three-pitch cluster.<ref>Wang (2005), p. 65.</ref> ] folk musicians employ an indigenous mouth organ that, like the ''shō'' and ''sheng'', produces tone clusters.<ref>''Musical Courier'' 164 (1962), p. 12.</ref> The characteristic musical form played on the ''bin-baja'', a strummed harp of ]'s Pardhan people, has been described as a "rhythmic ] on a tone cluster".<ref>Knight (1985).</ref>
==Notes==
{{reflist|2}}


Among the ], in the region that is today encompassed by Ghana, tone clusters are used in traditional trumpet music. A distinctive "tongue-rattling technique gives a greater vibrancy to...already dissonant tonal cluster.... ntentional dissonance dispels evil spirits, and the greater the clangor, the greater the sound barrage.<ref>Kaminski (2012), p. 185.</ref>
==Sources==

<div class="references-small">
==Notes and references==
{{col-begin}}
===Notes===
{{col-2}}
{{notelist|45em}}
*Altman, Rick (2004). ''Silent Film Sound''. New York and Chichester: Columbia University Press. ISBN 0-231-11662-4

*Anderson, Iain (2006). ''This Is Our Music: Free Jazz, the Sixties, And American Culture''. Philadelphia: University of Pennsylvania Press. ISBN 0-8122-3980-6
===References===
*Anderson, Martin (2002). Liner notes to ''Leo Ornstein: Piano Music'' (Hyperion 67320) (excerpted ).
{{reflist}}
*Bartok, Peter, Moses Asch, Marian Distler, and Sidney Cowell (1963). Liner notes to ''Henry Cowell: Piano Music'' (Folkways 3349); revised by Sorrel Hays (1993) (Smithsonian Folkways 40801).

*Berlin, Edward W. (1994). ''King of Ragtime: Scott Joplin and His Era''. New York and Oxford: Oxford University Press. ISBN 0-19-510108-1
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* Anderson, Iain (2006). ''This Is Our Music: Free Jazz, the Sixties, And American Culture''. Philadelphia: University of Pennsylvania Press. {{ISBN|0-8122-3980-6}}
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{{div col end}}


==External links== ==External links==
* several scores, including ''Wild Men's Dance'', featuring tone clusters * several scores, including ''Wild Men's Dance'', featuring tone clusters
* 2004–5 master's thesis on Cowell with detailed consideration of his use of tone clusters (though both ''The Tides of Manaunaun'' and ''Dynamic Motion'' are misdated); by Stephanie N. Stallings * 2004–05 master's thesis on Cowell with detailed consideration of his use of tone clusters (though both ''The Tides of Manaunaun'' and ''Dynamic Motion'' are misdated); by Stephanie N. Stallings

===Listening=== ===Listening===
* three works by Cowell on demand, including Concerto for Piano and Orchestra—its second movement is titled "Tone Cluster," though all three movements feature them * three works by Cowell on demand, including Concerto for Piano and Orchestra—its second movement is titled "Tone Cluster", though all three movements feature them
* six works by the composer, including ''The Tides of Manaunaun'' and ''The Harp of Life,'' with their chromatic and diatonic clusters, and ''Exultation,'' which features pentatonic clusters * six works by the composer, including ''The Tides of Manaunaun'' and ''The Harp of Life,'' with their chromatic and diatonic clusters, and ''Exultation,'' which features pentatonic clusters
* three works by the composer, including ''In the Name of the Holocaust'' * three works by the composer, including ''In the Name of the Holocaust''
* video of performance by Margaret Leng Tan * video of performance by Margaret Leng Tan
* Marc-André Hamelin's performance of ''Suicide in an Airplane'' from ''Leo Ornstein: Piano Music'' (Hyperion 67320) * , ]'s performance of ''Suicide in an Airplane'' from ''Leo Ornstein: Piano Music'' (Hyperion 67320)


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Dense musical chord
Example of piano tone clusters. The clusters in the upper staff—C♯ D♯ F♯ G♯—are four successive black keys. The last two bars, played with overlapping hands, are a denser cluster.

A tone cluster is a musical chord comprising at least three adjacent tones in a scale. Prototypical tone clusters are based on the chromatic scale and are separated by semitones. For instance, three adjacent piano keys (such as C, C♯, and D) struck simultaneously produce a tone cluster. Variants of the tone cluster include chords comprising adjacent tones separated diatonically, pentatonically, or microtonally. On the piano, such clusters often involve the simultaneous striking of neighboring white or black keys.

The early years of the twentieth century saw tone clusters elevated to central roles in pioneering works by ragtime artists Jelly Roll Morton and Scott Joplin. In the 1910s, two classical avant-gardists, composer-pianists Leo Ornstein and Henry Cowell, were recognized as making the first extensive explorations of the tone cluster. During the same period, Charles Ives employed them in several compositions that were not publicly performed until the late 1920s or 1930s, as did Béla Bartók in the latter decade. Since the mid-20th century, they have prominently featured in the work of composers such as Lou Harrison, Giacinto Scelsi, Alfred Schnittke and Karlheinz Stockhausen, and later Eric Whitacre. Tone clusters also play a significant role in the work of free jazz musicians such as Cecil Taylor, Matthew Shipp, and Kevin Kastning.

In most Western music, tone clusters tend to be heard as dissonant. Clusters may be performed with almost any individual instrument on which three or more notes can be played simultaneously, as well as by most groups of instruments or voices. Keyboard instruments are particularly suited to the performance of tone clusters because it is relatively easy to play multiple notes in unison on them.

Music theory and classification

The modern keyboard is designed for playing a diatonic scale on the white keys and a pentatonic scale on the black keys. Chromatic scales involve both. Three immediately adjacent keys produce a basic chromatic tone cluster.

Prototypical tone clusters are chords of three or more adjacent notes on a chromatic scale, that is, three or more adjacent pitches each separated by only a semitone. Three-note stacks based on diatonic and pentatonic scales are also, strictly speaking, tone clusters. However, these stacks involve intervals between notes greater than the half-tone gaps of the chromatic kind. This can readily be seen on a keyboard, where the pitch of each key is separated from the next by one semitone (visualizing the black keys as extending to the edge of the keyboard): Diatonic scales—conventionally played on the white keys—contain only two semitone intervals; the rest are full tones. In Western musical traditions, pentatonic scales—conventionally played on the black keys—are built entirely from intervals larger than a semitone. Commentators thus tend to identify diatonic and pentatonic stacks as "tone clusters" only when they consist of four or more successive notes in the scale. In standard Western classical music practice, all tone clusters are classifiable as secundal chords—that is, they are constructed from minor seconds (intervals of one semitone), major seconds (intervals of two semitones), or, in the case of certain pentatonic clusters, augmented seconds (intervals of three semitones). Stacks of adjacent microtonal pitches also constitute tone clusters.

A thirteenth chord collapsed into one octave results in a dissonant tone cluster

In tone clusters, the notes are sounded fully and in unison, distinguishing them from ornamented figures involving acciaccaturas and the like. Their effect also tends to be different: where ornamentation is used to draw attention to the harmony or the relationship between harmony and melody, tone clusters are for the most part employed as independent sounds. While, by definition, the notes that form a cluster must sound at the same time, there is no requirement that they must all begin sounding at the same moment. For example, in R. Murray Schafer's choral Epitaph for Moonlight (1968), a tone cluster is constructed by dividing each choir section (soprano/alto/tenor/bass) into four parts. Each of the sixteen parts enters separately, humming a note one semitone lower than the note hummed by the previous part, until all sixteen are contributing to the cluster.

By the fourth octave of the harmonic series, successive harmonics form increasingly small seconds the fifth octave of harmonics (16–32)

Tone clusters have generally been thought of as dissonant musical textures, and even defined as such. As noted by Alan Belkin, however, instrumental timbre can have a significant impact on their effect: "Clusters are quite aggressive on the organ, but soften enormously when played by strings (possibly because slight, continuous fluctuations of pitch in the latter provide some inner mobility)." In his first published work on the topic, Henry Cowell observed that a tone cluster is "more pleasing" and "acceptable to the ear if its outer limits form a consonant interval." Cowell explains, "the natural spacing of so-called dissonances is as seconds, as in the overtone series, rather than sevenths and ninths....Groups spaced in seconds may be made to sound euphonious, particularly if played in conjunction with fundamental chord notes taken from lower in the same overtone series. Blends them together and explains them to the ear." Tone clusters have also been considered noise. As Mauricio Kagel says, "clusters have generally been used as a kind of anti-harmony, as a transition between sound and noise." Tone clusters thus also lend themselves to use in a percussive manner. Historically, they were sometimes discussed with a hint of disdain. One 1969 textbook defines the tone cluster as "an extra-harmonic clump of notes".

Notation and execution

Example of Henry Cowell's notation of tone clusters for piano

In his 1917 piece The Tides of Manaunaun, Cowell introduced a new notation for tone clusters on the piano and other keyboard instruments. In this notation, only the top and bottom notes of a cluster, connected by a single line or a pair of lines, are represented. This developed into the solid-bar style seen in the image on the right. Here, the first chord—stretching two octaves from D2 to D4—is a diatonic (so-called white-note) cluster, indicated by the natural sign below the staff. The second is a pentatonic (so-called black-note) cluster, indicated by the flat sign; a sharp sign would be required if the notes showing the limit of the cluster were spelled as sharps. A chromatic cluster—black and white keys together—is shown in this method by a solid bar with no sign at all. In scoring the large, dense clusters of the solo organ work Volumina in the early 1960s, György Ligeti, using graphical notation, blocked in whole sections of the keyboard.

The performance of keyboard tone clusters is widely considered an "extended technique"—large clusters require unusual playing methods often involving the fist, the flat of the hand, or the forearm. Thelonious Monk and Karlheinz Stockhausen each performed clusters with their elbows; Stockhausen developed a method for playing cluster glissandi with special gloves. Don Pullen would play moving clusters by rolling the backs of his hands over the keyboard. Boards of various dimension are sometimes employed, as in the Concord Sonata (c. 1904–19) of Charles Ives; they can be weighted down to execute clusters of long duration. Several of Lou Harrison's scores call for the use of an "octave bar", crafted to facilitate high-speed keyboard cluster performance. Designed by Harrison with his partner William Colvig, the octave bar is

a flat wooden device approximately two inches high with a grip on top and sponge rubber on the bottom, with which the player strikes the keys. Its length spans an octave on a grand piano. The sponge rubber bottom is sculpted so that its ends are slightly lower than its center, making the outer tones of the octave sound with greater force than the intermediary pitches. The pianist can thus rush headlong through fearfully rapid passages, precisely spanning an octave at each blow.

Use in Western music

Before the 1900s

The earliest example of tone clusters in a Western music composition thus far identified is in the Allegro movement of Heinrich Biber's Battalia à 10 (1673) for string ensemble, which calls for several diatonic clusters. An orchestral diatonic cluster, containing all the notes of the harmonic minor scale, occurs also in the representation of chaos in the opening of Jean-Féry Rebel's 1737–38 ballet Les Élémens.

Rebel, Les Élemens, opening
Rebel, Les Élemens, opening

From the next century-and-a-half, a few more examples have been identified, mostly no more than a fleeting instance of the form, for example in the opening of J.S. Bach's Cantata O Ewigkeit, du Donnerwort, BWV 60

Bach, ̊O ewigkeit du donnerwort' BWV60 opening
Bach, ̊O ewigkeit du donnerwort' BWV 60

or in the concluding two bars of the "Loure" from the same composer's French Suite No. 5, BWV 816:

Loure from Bach's French Suite No. 5, concluding bars
Loure from Bach, French Suite No. 5, concluding bars

or the collisions that result from the interaction of multiple lines "locked together in suspensions" in Bach's The Musical Offering:

Ricercar a 6 from The Musical Offering bars 29–31
J. S. Bach, Ricercar a 6 from The Musical Offering bars 29–31

In the keyboard sonatas of Domenico Scarlatti (1685–1757), we find a more daring and idiosyncratic use of tone clusters. In the following passage from the late 1740s, Scarlatti builds the dissonances over several bars:

Scarlatti Keyboard Sonata K119 bars 143–168
Scarlatti Keyboard Sonata K119 bars 143–168

Ralph Kirkpatrick says that these chords "are not clusters in the sense that they are arbitrary blobs of dissonance, nor are they necessarily haphazard fillings up of diatonic intervals or simultaneous soundings of neighboring tones; they are logical expressions of Scarlatti's harmonic language and organic manifestations of his tonal structure." Frederick Neumann describes Sonata K175 (1750s) as "full of Scarlatti's famous tone clusters". During this era, as well, several French programmatic compositions for the harpsichord or piano represent cannon fire with clusters: works by François Dandrieu (Les Caractères de la guerre, 1724), Michel Corrette (La Victoire d'un combat naval, remportée par une frégate contre plusieurs corsaires réunis, 1780), Claude-Bénigne Balbastre (March des Marseillois, 1793), Pierre Antoine César (La Battaille de Gemmap, ou la prise de Mons, c. 1794), Bernard Viguerie (La Bataille de Maringo, pièce militaire et hitorique, for piano trio, 1800), and Jacques-Marie Beauvarlet-Charpentier (Battaille d'Austerlitz, 1805).

A dramatic use of a "virtual" tone cluster can be found in Franz Schubert's song "Erlkönig" (1815–21). Here, a terrified child calls out to his father when he sees an apparition of the sinister Erl King. The dissonant voicing of the dominant minor ninth chord used here (C) is particularly effective in heightening the drama and sense of threat.

From Schubert's "Erlkönig"
Extract from Schubert's "Erlkönig"

Writing about this passage, Richard Taruskin remarked on the "unprecedented ... level of dissonance at the boy's outcries. ... The voice has the ninth, pitched above, and the left hand has the seventh, pitched below. The result is a virtual 'tone cluster' ... the harmonic logic of these progressions, within the rules of composition Schubert was taught, can certainly be demonstrated. That logic, however, is not what appeals so strongly to the listener's imagination; rather it is the calculated impression (or illusion) of wild abandon."

The concluding Arietta from Beethoven’s last Piano Sonata No. 32, Op. 111 features a passage which, according to Martin Cooper “gives a momentary touch of blurredness by the repeated cluster of fourths.”

Beethoven arietta from Piano Sonata 32, bars 96–97
Beethoven arietta from Piano Sonata 32, bars 96–97

The next known compositions after Charpentier's to feature tone clusters are Charles-Valentin Alkan's "Une fusée" (A Rocket) Op. 55, published in 1859, and his "Les Diablotins" (The Imps), a miniature from the set of 49 Esquisses (sketches) for solo piano, published in 1861.

Extract from Alkan's Les diablotins, Op. 63, no. 45, featuring tone clusters

There is also the solo piano piece Battle of Manassas, written in 1861 by "Blind Tom" Bethune and published in 1866. The score instructs the pianist to represent cannon fire at various points by striking "with the flat of the hand, as many notes as possible, and with as much force as possible, at the bass of the piano." In 1887, Giuseppe Verdi became the first notable composer in the Western tradition to write an unmistakable chromatic cluster: the storm music with which Otello opens includes an organ cluster (C, C♯, D) that also has the longest notated duration of any scored musical texture known. The choral finale of Gustav Mahler's Symphony No. 2 features a tone cluster of great poignancy arising naturally out of voice leading to the words "wird, der dich rief, dir geben":

Mahler Symphony 2 finale Fig 32, bars 4–10
Mahler Symphony 2 finale Fig 32, bars 4–10

Still, it was not before the second decade of the twentieth century that tone clusters assumed a recognized place in Western classical music practice.

In classical music of the early 1900s

Leo Ornstein was the first composer to be widely known for using tone clusters—though the term itself was not yet used to describe the radical aspect of his work.
Final chord of Tintamarre

"Around 1910," Harold C. Schonberg writes, "Percy Grainger was causing a stir by the near–tone clusters in such works as his Gumsuckers March." In 1911, what appears to be the first published classical composition to thoroughly integrate true tone clusters was issued: Tintamarre (The Clangor of Bells), by Canadian composer J. Humfrey Anger (1862–1913).

Within a few years, the radical composer-pianist Leo Ornstein became one of the most famous figures in classical music on both sides of the Atlantic for his performances of cutting-edge work. In 1914, Ornstein debuted several of his own solo piano compositions: Wild Men's Dance (aka Danse Sauvage; c. 1913–14), Impressions of the Thames (c. 1913–14), and Impressions of Notre Dame (c. 1913–14) were the first works to explore the tone cluster in depth ever heard by a substantial audience. Wild Men's Dance, in particular, was constructed almost entirely out of clusters (listen). In 1918, critic Charles L. Buchanan described Ornstein's innovation: " gives us masses of shrill, hard dissonances, chords consisting of anywhere from eight to a dozen notes made up of half tones heaped one upon another."

Clusters were also beginning to appear in more pieces by European composers. Isaac Albéniz's use of them in Iberia (1905–1908) may have influenced Gabriel Fauré's subsequent piano writing. Joseph Horowitz has suggested that the "dissonant star clusters" in its third and fourth books were particularly compelling to Olivier Messiaen, who called Iberia "the wonder of the piano". The Thomas de Hartmann score for Wassily Kandinsky's stage show The Yellow Sound (1909) employs a chromatic cluster at two climactic points. Alban Berg's Four Pieces for clarinet and piano (1913) calls for clusters along with other avant-garde keyboard techniques. Claude Debussy's Piano Prelude "La Cathédrale Engloutie" makes powerful use of clusters to evoke the sound of "pealing bells – with so many added major seconds one would call this pan-diatonic harmony".

Debussy "La cathédrale engloutie", bars 22–28
Debussy "La cathédrale engloutie", bars 22–28

In his 1913 piano prelude "General Lavine – Excentric", one of the first pieces to be influenced by black American popular styles (the Cakewalk) Debussy features abrasive tone clusters at the conclusion of the following passage:

Debussy, "General Lavine" – excentric, bars 11–19
Debussy, "General Lavine" – excentric, bars 11–18

In his 1915 arrangement for solo piano of his Six Epigraphes Antiques (1914), originally a set of piano duets, Debussy includes tone clusters in the fifth piece, Pour l'Egyptienne.

Debussy, Pour l'Egyptienne from 6 Epigraphes Antiques (solo piano version)

Russian composer Vladimir Rebikov used them extensively in his Three Idylles, Op. 50, written in 1913. Richard Strauss's An Alpine Symphony (1915) "starts and ends with the setting sun—a B flat minor chord cluster slowly built down."

Though much of his work was made public only years later, Charles Ives had been exploring the possibilities of the tone cluster—which he referred to as the "group chord"—for some time. In 1906–07, Ives composed his first mature piece to extensively feature tone clusters, Scherzo: Over the Pavements. Orchestrated for a nine-piece ensemble, it includes both black- and white-note clusters for the piano. Revised in 1913, it would not be recorded and published until the 1950s and would have to wait until 1963 to receive its first public performance. During the same period that Ornstein was introducing tone clusters to the concert stage, Ives was developing a piece with what would become the most famous set of clusters: in the second movement, "Hawthorne", of the Concord Sonata (c. 1904–1915, publ. 1920, prem. 1928, rev. 1947), mammoth piano chords require a wooden bar almost fifteen inches long to play. The gentle clusters produced by the felt- or flannel-covered bar represent the sound of far-off church bells (listen). Later in the movement, there are a series of five-note diatonic clusters for the right hand. In his notes to the score, Ives indicates that "these group-chords...may, if the player feels like it, be hit with the clenched fist." Between 1911 and 1913, Ives also wrote ensemble pieces with tone clusters such as his Second String Quartet and the orchestral Decoration Day and Fourth of July, though none of these would be publicly performed before the 1930s.

In the work of Henry Cowell

As a composer, performer, and theorist, Henry Cowell was largely responsible for establishing the tone cluster in the lexicon of modern classical music.
Tides of Manaunaun (1917) The opening of Cowell's seminal piece
Problems playing this file? See media help.

In June 1913, a sixteen-year-old Californian with no formal musical training wrote a solo piano piece, Adventures in Harmony, employing "primitive tone clusters". Henry Cowell would soon emerge as the seminal figure in promoting the cluster harmonic technique. Ornstein abandoned the concert stage in the early 1920s and, anyway, clusters had served him as practical harmonic devices, not as part of a larger theoretical mission. In the case of Ives, clusters comprised a relatively small part of his compositional output, much of which went unheard for years. For the intellectually ambitious Cowell—who heard Ornstein perform in New York in 1916—clusters were crucial to the future of music. He set out to explore their "overall, cumulative, and often programmatic effects".

Dynamic Motion (1916) for solo piano, written when Cowell was nineteen, has been described as "probably the first piece anywhere using secundal chords independently for musical extension and variation." Though that is not quite accurate, it does appear to be the first piece to employ chromatic clusters in such a manner. A solo piano piece Cowell wrote the following year, The Tides of Manaunaun (1917), would prove to be his most popular work and the composition most responsible for establishing the tone cluster as a significant element in Western classical music. (Cowell's early piano works are often erroneously dated; in the two cases above, as 1914 and 1912, respectively.) Assumed by some to involve an essentially random—or, more kindly, aleatoric—pianistic approach, Cowell would explain that precision is required in the writing and performance of tone clusters no less than with any other musical feature:

Tone clusters...on the piano whole scales of tones used as chords, or at least three contiguous tones along a scale being used as a chord. And, at times, if these chords exceed the number of tones that you have fingers on your hand, it may be necessary to play these either with the flat of the hand or sometimes with the full forearm. This is not done from the standpoint of trying to devise a new piano technique, although it actually amounts to that, but rather because this is the only practicable method of playing such large chords. It should be obvious that these chords are exact and that one practices diligently in order to play them with the desired tone quality and to have them absolutely precise in nature.

Historian and critic Kyle Gann describes the broad range of ways in which Cowell constructed (and thus performed) his clusters and used them as musical textures, "sometimes with a top note brought out melodically, sometimes accompanying a left-hand melody in parallel."

Beginning in 1921, with an article serialized in The Freeman, an Irish cultural journal, Cowell popularized the term tone cluster. While he did not coin the phrase, as is often claimed, he appears to have been the first to use it with its current meaning. During the 1920s and 1930s, Cowell toured widely through North America and Europe, playing his own experimental works, many built around tone clusters. In addition to The Tides of Manaunaun, Dynamic Motion, and its five "encores"What's This (1917), Amiable Conversation (1917), Advertisement (1917), Antinomy (1917, rev. 1959; frequently misspelled "Antimony"), and Time Table (1917)—these include The Voice of Lir (1920), Exultation (1921), The Harp of Life (1924), Snows of Fujiyama (1924), Lilt of the Reel (1930), and Deep Color (1938). Tiger (1930) has a chord of 53 notes, probably the largest ever written for a single instrument until 1969. Along with Ives, Cowell wrote some of the first large-ensemble pieces to make extensive use of clusters. The Birth of Motion (c. 1920), his earliest such effort, combines orchestral clusters with glissando. "Tone Cluster", the second movement of Cowell's Concerto for Piano and Orchestra (1928, prem. 1978), employs a wide variety of clusters for the piano and each instrumental group (listen). From a quarter-century later, his Symphony No. 11 (1953) features a sliding chromatic cluster played by muted violins.

In his theoretical work New Musical Resources (1930), a major influence on the classical avant-garde for many decades, Cowell argued that clusters should not be employed simply for color:

In harmony it is often better for the sake of consistency to maintain a whole succession of clusters, once they are begun; since one alone, or even two, may be heard as a mere effect, rather than as an independent and significant procedure, carried with musical logic to its inevitable conclusion.

In later classical music

Béla Bartók and Henry Cowell met in December 1923. Early the next year, the Hungarian composer wrote Cowell to ask whether he might adopt tone clusters without causing offense.

In 1922, composer Dane Rudhyar, a friend of Cowell's, declared approvingly that the development of the tone cluster "imperilled existence" of "the musical unit, the note". While that threat was not to be realized, clusters began to appear in the works of a growing number of composers. Already, Aaron Copland had written his Three Moods (aka Trois Esquisses; 1920–21) for piano—its name an apparent homage to a piece of Leo Ornstein's—which includes a triple-forte cluster. The most renowned composer to be directly inspired by Cowell's demonstrations of his tone cluster pieces was Béla Bartók, who requested Cowell's permission to employ the method. Bartók's First Piano Concerto, Piano Sonata, and the "Night Music" from the Out of Doors suite (all 1926), his first significant works after three years in which he produced little, extensively feature tone clusters.

In the 1930s, Cowell's student Lou Harrison utilized keyboard clusters in several works such as his Prelude for Grandpiano (1937). At least as far back as 1942, John Cage, who also studied under Cowell, began writing piano pieces with cluster chords; In the Name of the Holocaust, from December of that year, includes chromatic, diatonic, and pentatonic clusters. Olivier Messiaen's Vingt regards sur l'enfant Jésus (1944), often described as the most important solo piano piece of the first half of the twentieth century, employs clusters throughout. They would feature in numerous subsequent piano works, by a range of composers. Karlheinz Stockhausen's Klavierstück X (1961) makes bold, rhetorical use of chromatic clusters, scaled in seven degrees of width, from three to thirty-six semitones, as well as ascending and descending cluster arpeggios and cluster glissandi. Written two decades later, his Klavierstück XIII employs many of the same techniques, along with clusters that call for the pianist to sit down on the keyboard. George Crumb's Apparitions, Elegiac Songs, and Vocalises for Soprano and Amplified Piano (1979), a setting of verse by Walt Whitman, is filled with clusters, including an enormous one that introduces three of its sections. The piano part of the second movement of Joseph Schwantner's song cycle Magabunda (1983) has perhaps the single largest chord ever written for an individual instrument: all 88 notes on the keyboard.

While tone clusters are conventionally associated with the piano, and the solo piano repertoire in particular, they have also assumed important roles in compositions for chamber groups and larger ensembles. Robert Reigle identifies Croatian composer Josip Slavenski's organ-and-violin Sonata Religiosa (1925), with its sustained chromatic clusters, as "a missing link between Ives and Ligeti." Bartók employs both diatonic and chromatic clusters in his Fourth String Quartet (1928). The sound mass technique in such works as Ruth Crawford Seeger's String Quartet (1931) and Iannis Xenakis's Metastaseis (1955) is an elaboration of the tone cluster. "Unlike most tonal and non-tonal linear dissonances, tone clusters are essentially static. The individual pitches are of secondary importance; it is the sound mass that is foremost." In one of the most famous pieces associated with the sound mass aesthetic, containing, "one of the largest clustering of individual pitches that has been written", Krzysztof Penderecki's Threnody to the Victims of Hiroshima (1959), for fifty-two string instruments, the quarter-tone clusters "see to have abstracted and intensified the features that define shrieks of terror and keening cries of sorrow." Clusters appear in two sections of the electronic music of Stockhausen's Kontakte (1958–1960)—first as "hammering points...very difficult to synthesize", according to Robin Maconie, then as glissandi. In 1961, Ligeti wrote perhaps the largest cluster chord ever—in the orchestral Atmosphères, every note in the chromatic scale over a range of five octaves is played at once (quietly). Ligeti's organ works make extensive use of clusters. Volumina (1961–62), graphically notated, consists of static and mobile cluster masses, and calls on many advanced cluster-playing techniques.

The eighth movement of Messiaen's oratorio La Transfiguration de Notre Seigneur Jésus-Christ (1965–1969) features "a shimmering halo of tone-cluster glissandi" in the strings, evoking the "bright cloud" to which the narrative refers (listen). Orchestral clusters are employed throughout Stockhausen's Fresco (1969) and Trans (1971). In Morton Feldman's Rothko Chapel (1971), "Wordless vocal tone clusters seep out through the skeletal arrangements of viola, celeste, and percussion." Aldo Clementi's chamber ensemble piece Ceremonial (1973) evokes both Verdi and Ives, combining the original extended-duration and mass cluster concepts: a weighted wooden board placed on an electric harmonium maintains a tone cluster throughout the work. Judith Bingham's Prague (1995) gives a brass band the opportunity to create tone clusters. Keyboard clusters are set against orchestral forces in piano concertos such as Einojuhani Rautavaara's first (1969) and Esa-Pekka Salonen's (2007), the latter suggestive of Messiaen. The choral compositions of Eric Whitacre often employ clusters, as a trademark of his style. Whitacre's chord clusters are fundamentally based around voice leading and not easily interpretable by traditional harmonic analysis.

Three composers who made frequent use of tone clusters for a wide variety of ensembles are Giacinto Scelsi, Alfred Schnittke—both of whom often worked with them in microtonal contexts—and Lou Harrison. Scelsi employed them for much of his career, including in his last large-scale work, Pfhat (1974), which premiered in 1986. They are found in works of Schnittke's ranging from the Quintet for Piano and Strings (1972–1976), where "microtonal strings fin tone clusters between the cracks of the piano keys", to the choral Psalms of Repentance (1988). Harrison's many pieces featuring clusters include Pacifika Rondo (1963), Concerto for Organ with Percussion (1973), Piano Concerto (1983–1985), Three Songs for male chorus (1985), Grand Duo (1988), and Rhymes with Silver (1996).

In jazz

Scott Joplin wrote the first known published composition to include a musical sequence built around specifically notated tone clusters.

Tone clusters have been employed by jazz artists in a variety of styles, since the very beginning of the form. Around the turn of the twentieth century, Storyville pianist Jelly Roll Morton began performing a ragtime adaptation of a French quadrille, introducing large chromatic tone clusters played by his left forearm. The growling effect led Morton to dub the piece his "Tiger Rag" (listen). In 1909, Scott Joplin's deliberately experimental "Wall Street Rag" included a section prominently featuring notated tone clusters.

Scott Joplin, from Wall Street Rag
Scott Joplin, from Wall Street Rag

The fourth of Artie Matthews's Pastime Rags (1913–1920) features dissonant right-hand clusters. Thelonious Monk, in pieces such as "Bright Mississippi" (1962), "Introspection" (1946) and "Off Minor" (1947), uses clusters as dramatic figures within the central improvisation and to accent the tension at its conclusion. They are heard on Art Tatum's "Mr. Freddy Blues" (1950), undergirding the cross-rhythms. By 1953, Dave Brubeck was employing piano tone clusters and dissonance in a manner anticipating the style free jazz pioneer Cecil Taylor would soon develop. The approach of hard bop pianist Horace Silver is an even clearer antecedent to Taylor's use of clusters. During the same era, clusters appear as punctuation marks in the lead lines of Herbie Nichols. In "The Gig" (1955), described by Francis Davis as Nichols's masterpiece, "clashing notes and tone clusters depic a pickup band at odds with itself about what to play." Recorded examples of Duke Ellington's piano cluster work include "Summertime" (1961) and ...And His Mother Called Him Bill (1967) and This One's for Blanton!, his tribute to a former bass player, recorded in 1972 with bassist Ray Brown. Bill Evans' interpretation of "Come Rain or Come Shine" from the album Portrait in Jazz (1960), opens with a striking 5-tone cluster.

In jazz, as in classical music, tone clusters have not been restricted to the keyboard. In the 1930s, the Jimmie Lunceford Orchestra's "Stratosphere" included ensemble clusters among an array of progressive elements. The Stan Kenton Orchestra's April 1947 recording of "If I Could Be With You One Hour Tonight", arranged by Pete Rugolo, features a dramatic four-note trombone cluster at the end of the second chorus. As described by critic Fred Kaplan, a 1950 performance by the Duke Ellington Orchestra features arrangements with the collective "blowing rich, dark, tone clusters that evoke Ravel". Chord clusters also feature in the scores of arranger Gil Evans. In his characteristically imaginative arrangement of George Gershwin's "There's a boat that's leaving soon for New York" from the album Porgy and Bess, Evans contributes chord clusters orchestrated on flutes, alto saxophone and muted trumpets as a background to accompany Miles Davis' solo improvisation. In the early 1960s, arrangements by Bob Brookmeyer and Gerry Mulligan for Mulligan's Concert Jazz Band employed tone clusters in a dense style bringing to mind both Ellington and Ravel. Eric Dolphy's bass clarinet solos would often feature "microtonal clusters summoned by frantic overblowing". Critic Robert Palmer called the "tart tone cluster" that "pierces a song's surfaces and penetrates to its heart" a specialty of guitarist Jim Hall's.

Clusters are especially prevalent in the realm of free jazz. Cecil Taylor has used them extensively as part of his improvisational method since the mid-1950s. Like much of his musical vocabulary, his clusters operate "on a continuum somewhere between melody and percussion". One of Taylor's primary purposes in adopting clusters was to avoid the dominance of any specific pitch. Leading free jazz composer, bandleader, and pianist Sun Ra often used them to rearrange the musical furniture, as described by scholar John F. Szwed:

When he sensed that piece needed an introduction or an ending, a new direction or fresh material, he would call for a space chord, a collectively improvised tone cluster at high volume which "would suggest a new melody, maybe a rhythm." It was a pianistically conceived device which created another context for the music, a new mood, opening up fresh tonal areas.

As free jazz spread in the 1960s, so did the use of tone clusters. In comparison with what John Litweiler describes as Taylor's "endless forms and contrasts", the solos of Muhal Richard Abrams employ tone clusters in a similarly free, but more lyrical, flowing context. Guitarist Sonny Sharrock made them a central part of his improvisations; in Palmer's description, he executed "glass-shattering tone clusters that sounded like someone was ripping the pickups out of the guitar without having bothered to unplug it from its overdriven amplifier." Pianist Marilyn Crispell has been another major free jazz proponent of the tone cluster, frequently in collaboration with Anthony Braxton, who played with Abrams early in his career. Since the 1990s, Matthew Shipp has built on Taylor's innovations with the form. European free jazz pianists who have contributed to the development of the tone cluster palette include Gunter Hampel and Alexander von Schlippenbach.

Don Pullen, who bridged free and mainstream jazz, "had a technique of rolling his wrists as he improvised—the outside edges of his hands became scarred from it—to create moving tone clusters", writes critic Ben Ratliff. "Building up from arpeggios, he could create eddies of noise on the keyboard...like concise Cecil Taylor outbursts." In the description of Joachim Berendt, Pullen "uniquely melodized cluster playing and made it tonal. He phrases impulsively raw clusters with his right hand and yet embeds them in clear, harmonically functional tonal chords simultaneously played with the left hand." John Medeski employs tone clusters as keyboardist for Medeski Martin & Wood, which mixes free jazz elements into its soul jazz/jam band style.

In popular music

Like jazz, rock and roll has made use of tone clusters since its birth, if characteristically in a less deliberate manner—most famously, Jerry Lee Lewis's live-performance piano technique of the 1950s, involving fists, feet, and derrière. Since the 1960s, much drone music, which crosses the lines between rock, electronic, and experimental music, has been based on tone clusters. On The Velvet Underground's "Sister Ray", recorded in September 1967, organist John Cale uses tone clusters within the context of a drone; the song is apparently the closest approximation on record of the band's early live sound. Around the same time, Doors keyboardist Ray Manzarek began introducing clusters into his solos during live performances of the band's hit "Light My Fire".

Kraftwerk's self-titled 1970 debut album employs organ clusters to add variety to its repeated tape sequences. In 1971, critic Ed Ward lauded the "tone-cluster vocal harmonies" created by Jefferson Airplane's three lead singers, Grace Slick, Marty Balin, and Paul Kantner. Tangerine Dream's 1972 double album Zeit is replete with clusters performed on synthesizer. The Beatles' 1965 song "We Can Work It Out" features a momentarily grating tone cluster with voices singing A sharp and C sharp against the accompanying keyboard playing a sustained chord on B to the word "time". The Band's 1968 song "The Weight" from their debut album Music from Big Pink features a dissonant vocal refrain with suspensions culminating in a 3-note cluster to the words "you put the load right on me."

The sound of tone clusters played on the organ became a convention in radio drama for dreams. Clusters are often used in the scoring of horror and science-fiction films. For a 2004 production of the play Tone Clusters by Joyce Carol Oates, composer Jay Clarke—a member of the indie rock bands Dolorean and The Standard—employed clusters to "subtly build the tension", in contrast to what he perceived in the cluster pieces by Cowell and Ives suggested by Oates: "Some of it was like music to murder somebody to; it was like horror-movie music."

Use in other music

In traditional Japanese gagaku, the imperial court music, a tone cluster performed on shō (a type of mouth organ) is generally employed as a harmonic matrix. Yoritsune Matsudaira, active from the late 1920s to the early 2000s, merged gagaku's harmonies and tonalities with avant-garde Western techniques. Much of his work is built on the shō's ten traditional cluster formations. Lou Harrison's Pacifika Rondo, which mixes Eastern and Western instrumentation and styles, mirrors the gagaku approach—sustained organ clusters emulate the sound and function of the shō. The shō also inspired Benjamin Britten in creating the instrumental texture of his 1964 dramatic church parable Curlew River. Its sound pervades the characteristically sustained cluster chords played on a chamber organ . Traditional Korean court and aristocratic music employs passages of simultaneous ornamentation on multiple instruments, creating dissonant clusters; this technique is reflected in the work of twentieth-century Korean German composer Isang Yun.

Several East Asian free reed instruments, including the shō, were modeled on the sheng, an ancient Chinese folk instrument later incorporated into more formal musical contexts. Wubaduhesheng, one of the traditional chord formations played on the sheng, involves a three-pitch cluster. Malayan folk musicians employ an indigenous mouth organ that, like the shō and sheng, produces tone clusters. The characteristic musical form played on the bin-baja, a strummed harp of central India's Pardhan people, has been described as a "rhythmic ostinato on a tone cluster".

Among the Asante, in the region that is today encompassed by Ghana, tone clusters are used in traditional trumpet music. A distinctive "tongue-rattling technique gives a greater vibrancy to...already dissonant tonal cluster.... ntentional dissonance dispels evil spirits, and the greater the clangor, the greater the sound barrage.

Notes and references

Notes

  1. For a discussion of the piece, see Keillor, Elaine (2004-05-10). "Writing for a Market—Canadian Musical Composition Before the First World War". Library and Archives Canada/Bibliothèque et Archives Canada. Retrieved 2011-08-29. The score of Tintamarre and its publication record are also available online via Library and Archives Canada/Bibliothèque et Archives Canada. See also Keillor (2000) and "Anger, Humfrey". Encyclopedia of Music in Canada. The Canadian Encyclopedia. Retrieved 2007-08-20. The early performance history of Tintamarre has not been established.
  2. See Broyles (2004), p. 78, for premiere of these works. The piano music for Ornstein's Sonata for Violin and Piano, Op. 31 (1915; not 1913 as is often erroneously given), also employs tone clusters, though not to the extent of Wild Men's Dance. Three Moods (c. 1914) for solo piano has been said to contain clusters (Pollack , p. 44); perusal online of the published score, however, does not reveal any. Ornstein's solo piano piece Suicide in an Airplane (n.d.), which makes incontrovertible use of tone clusters in one extended passage, is often erroneously dated "1913" or "c. 1913"; in fact, it is undated and there is no record of its existence before 1919 (Anderson ).
  3. Thomas B. Holmes (1985; 2002: p. 35) notes that the song Majority (aka The Masses), written by Ives in 1888 at the age of fourteen, incorporates tone clusters in the piano accompaniment. He correctly describes this as "a rebellious act for a beginning composer". He errs in calling it "probably the first documented use of a tone cluster in a score". Swafford (1998) observes that Ives chose to begin his 114 Songs (publ. 1922) with the work (pp. 227, 271, 325). And he too miscredits Ives with the "invention of the tone cluster" (p. 231). On the other hand, he valuably points to Ives's awareness that "tone clusters...had been there since time immemorial when large groups sang. The mistakes were part of the music" (p. 98).
  4. Swafford (1998), pp. 251, 252, 472, for descriptions; Sinclair (1999), passim, for proper dating of Scherzo: Over the Pavements, Concord Sonata, and other named pieces: Second String Quartet (1911–13, prem. 1946, publ. 1954); Decoration Day (c. 1912–13, rev. c. 1923–24, prem. 1931, publ. 1962); Fourth of July (c. 1911–13, rev. c. 1931, publ./prem. 1932).
  5. See Seachrist (2003), p. 215, n. 15, for an example of a claim that the "term was invented by Henry Cowell". Tone cluster had been used with a different meaning since at least 1910 by music theorist and educator Percy Goetschius (n.d., 111): referring to an example of three-part counterpoint, "there is some good chord-form at almost every accent, some harmonic tone-cluster towards which the parts unanimously lead." See also his correspondence, "Schoenberg's 'Harmony,'" in The New Music Review and Church Music Review, vol. 14, no. 168 (November 1915), p. 404: "I have regretted that I did not, in revising my 'Material', lay still greater stress upon the accidental tone-clusters such as you illustrate"; "in Ex. 318, No. 5, you will find the Mozart tone-cluster which you give in your Ex. 11."
  6. For a discussion of the use of tone clusters in film scoring, see Huckvale 1990, pp. 1–35. For descriptions of their role in three individual films, Hosokawa 2004, p. 60n21; for To the Devil a Daughter, Huckvale 2008, pp. 179–181 ; and, for Close Encounters, Neil Lerner, "Nostalgia, Masculinist Discourse, and Authoritarianism in John Williams' Scores for Star Wars and Close Encounters of the Third Kind," in Off the Planet, pp. 96–107; 105–106.

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  101. Pareles (1988).
  102. Anderson (2006), p. 111.
  103. Szwed (1998), p. 214.
  104. Litweiler (1990), p. 182.
  105. Palmer (1991).
  106. Enstice and Stockhouse (2004), p. 81.
  107. Weinstein (1996).
  108. Svirchev, Laurence (2006). ""If You Start from Point-Zero, You Have to Imagine Something": An Interview with Alexander von Schlippenbach". Jazz Journalists Association Library. Retrieved 2007-08-17.
  109. Berendt (1992), p. 287.
  110. Pareles (2000).
  111. Tyler (2008), p. 76; Morrison (1998), p. 95.
  112. Schwartz (1996), pp. 97, 94.
  113. Hicks (1999), p. 88.
  114. Bussy (2004), p. 31.
  115. Quoted in Brackett (2002), p. 217.
  116. Patterson (2001), p. 505.
  117. "We can work it out" (1986, p.990, bar 7) The Beatles Complete Scores. Hal Leonard
  118. Chandler 2004.
  119. Malm (2000), pp. 116–117.
  120. Herd (2008), pp. 373–374.
  121. Miller and Lieberman (2004), p. 155.
  122. Cooke, M. (1999, p. 183) "Distant Horizons", in The Cambridge Companion to Benjamin Britten. Cambridge University Press.
  123. Howard (2006), p. 152.
  124. Wang (2005), p. 65.
  125. Musical Courier 164 (1962), p. 12.
  126. Knight (1985).
  127. Kaminski (2012), p. 185.

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External links

  • Leo Ornstein Scores several scores, including Wild Men's Dance, featuring tone clusters
  • "New Growth from New Soil" 2004–05 master's thesis on Cowell with detailed consideration of his use of tone clusters (though both The Tides of Manaunaun and Dynamic Motion are misdated); by Stephanie N. Stallings

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