Twelve-tone technique—also known as dodecaphony, twelve-tone serialism, and (in British usage) twelve-note composition—is a method of musical composition devised by Austrian composer Arnold Schoenberg (1874–1951). The technique is a means of ensuring that all 12 notes of the chromatic scale are sounded as often as one another in a piece of music while preventing the emphasis of any one note through the use of tone rows, an ordering of the 12 pitches. All 12 notes are thus given more or less equal importance, and the music avoids being in a key. The technique was influential on composers in the mid-20th century.
Schoenberg himself described the system as a "Method of Composing with Twelve Tones Which are Related Only with One Another". However, the common English usage is to describe the method as a form of serialism.
Schoenberg's countryman and contemporary Josef Matthias Hauer also developed a similar system using unordered hexachords or tropes—but with no connection to Schoenberg's twelve-tone technique. Other composers have created systematic use of the chromatic scale, but Schoenberg's method is considered to be historically and aesthetically most significant.
History of use 
Invented by Austrian composer Arnold Schoenberg in 1921 and first described privately to his associates in 1923, the method was used during the next twenty years almost exclusively by the composers of the Second Viennese School – Alban Berg, Anton Webern, Hanns Eisler and Schoenberg himself.
The twelve tone technique was preceded by "freely" atonal pieces of 1908–23 which, though "free", often have as an "integrative element...a minute intervallic cell" which in addition to expansion may be transformed as with a tone row, and in which individual notes may "function as pivotal elements, to permit overlapping statements of a basic cell or the linking of two or more basic cells". The twelve-tone technique was also preceded by "nondodecaphonic serial composition" used independently in the works of Alexander Scriabin, Igor Stravinsky, Béla Bartók, Carl Ruggles, and others. Oliver Neighbour argues that Bartók was "the first composer to use a group of twelve notes consciously for a structural purpose," in 1908 with the third of his fourteen bagatelles. "Essentially, Schoenberg and Hauer systematized and defined for their own dodecaphonic purposes a pervasive technical feature of 'modern' musical practice, the ostinato". Additionally, the strict distinction between the two, emphasized by authors including Perle, is overemphasized:
The distinction often made between Hauer and the Schoenberg school—that the former's music is based on unordered hexachords while the latter's is based on an ordered series—is false: while he did write pieces that could be thought of as "trope pieces", much of Hauer's twelve-tone music employs an ordered series.
The "strict ordering" of the Second Viennese school, on the other hand, "was inevitably tempered by practical considerations: they worked on the basis of an interaction between ordered and unordered pitch collections."
Rudolph Reti, an early proponent, says: "To replace one structural force (tonality) by another (increased thematic oneness) is indeed the fundamental idea behind the twelve-tone technique," arguing it arose out of Schoenberg's frustrations with free atonality, providing a "positive premise" for atonality. In Hauer's breakthrough piece Nomos, Op. 19 (1919) he used twelve-tone sections to mark out large formal divisions, such as with the opening five statements of the same twelve-tone series, stated in groups of five notes making twelve five-note phrases.
Schoenberg's idea in developing the technique was for it to "replace those structural differentiations provided formerly by tonal harmonies". As such, twelve-tone music is usually atonal, and treats each of the 12 semitones of the chromatic scale with equal importance, as opposed to earlier classical music which had treated some notes as more important than others (particularly the tonic and the dominant note).
The technique became widely used by the fifties, taken up by composers such as Milton Babbitt, Luciano Berio, Pierre Boulez, Luigi Dallapiccola, Ernst Krenek, Riccardo Malipiero, and, after Schoenberg's death, Igor Stravinsky. Some of these composers extended the technique to control aspects other than the pitches of notes (such as duration, method of attack and so on), thus producing serial music. Some even subjected all elements of music to the serial process.
Charles Wuorinen claimed in a 1962 interview that while, "most of the Europeans say that they have 'gone beyond' and 'exhausted' the twelve-tone system," in America, "the twelve-tone system has been carefully studied and generalized into an edifice more impressive than any hitherto known."
Tone row 
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The basis of twelve-tone technique is the tone row, an ordered arrangement of the twelve notes of the chromatic scale (the twelve equal tempered pitch classes). There are four postulates or preconditions to the technique which apply to the set on which a work or section is based:
- The set is a specific ordering of all twelve notes of the semitonal scale.
- No note is repeated within the set
- The set may be stated in any of its "linear aspects": prime, inversion, retrograde, and retrograde-inversion.
- The set in any of its four transformations may be started upon any degree of the semitonal scale.
When twelve-tone technique is strictly applied, a piece consists of statements of certain permitted transformations of the prime series. These statements may appear consecutively, simultaneously, or may overlap, giving rise to harmony.
In Hauer's system postulate 3 does not apply.
The tone row chosen as the basis of the piece is called the prime series (P). Untransposed, it is notated as P0. Given the twelve pitch classes of the chromatic scale, there are (12!) (factorial, i.e. 479,001,600) tone rows, although 469,022,400 of these are merely transformations of other rows. There are 9,979,200 truly unique twelve-tone rows possible ("rows unrelated to any others through transposition, inversion, retrograde, and retrograde inversion.").
Appearances of P can be transformed from the original in three basic ways:
- transposition up or down, giving Pχ.
- reversal in time, giving the retrograde (R)
- reversal in pitch, giving the inversion (I): I(χ) = P(12 -χ).
The various transformations can be combined. These give rise to a set-complex of forty-eight forms of the set, 12 transpositions of the four basic forms: P, R, I, RI. The combination of the retrograde and inversion transformations is known as the retrograde inversion (RI).
|RI is:||RI of P,||R of I,||and I of R.|
|R is:||R of P,||RI of I,||and I of RI.|
|I is:||I of P,||RI of R,||and R of RI.|
|P is:||R of R,||I of I,||and RI of RI.|
thus, each cell in the following table lists the result of the transformations, a four-group, in its row and column headers:
However, there are only a few numbers by which one may multiply a row and still end up with twelve tones.
Suppose the prime series is as follows:
Then the retrograde is the prime series in reverse order:
The inversion is the prime series with the intervals inverted (so that a rising minor third becomes a falling minor third):
And the retrograde inversion is the inverted series in retrograde:
P, R, I and RI can each be started on any of the twelve notes of the chromatic scale, meaning that 47 permutations of the initial tone row can be used, giving a maximum of 48 possible tone rows. However, not all prime series will yield so many variations because transposed transformations may be identical to each other. This is known as invariance. A simple case is the ascending chromatic scale, the retrograde inversion of which is identical to the prime form, and the retrograde of which is identical to the inversion (thus, only 24 forms of this tone row are available).
In the above example, as is typical, the retrograde inversion contains three points where the sequence of two pitches are identical to the prime row. Thus the generative power of even the most basic transformations is both unpredictable and inevitable. Motivic development can be driven by this internal consistency both positively and negatively.
When rigorously applied, the technique demands that one statement of the tone row must be heard in full (otherwise known as aggregate completion) before another can begin. Adjacent notes in the row can be sounded at the same time, and the notes can appear in any octave, but the order of the notes in the tone row must be maintained. Durations, dynamics and other aspects of music other than the pitch can be freely chosen by the composer, and there are also no rules about which tone rows should be used at which time (beyond their all being derived from the prime series, as already explained).
Derivation is transforming segments of the full chromatic, less than 12 pitch classes, to yield a complete set, most commonly using trichords, tetrachords, and hexachords. A derived set can be generated by choosing appropriate transformations of any trichord except 0,3,6, the diminished triad. A derived set can also be generated from any tetrachord that excludes the interval class 4, a major third, between any two elements. The opposite, partitioning, uses methods to create segments from sets, most often through registral difference.
Combinatoriality is a side-effect of derived rows where combining different segments or sets such that the pitch class content of the result fulfills certain criteria, usually the combination of hexachords which complete the full chromatic.
Invariant formations are also the side effect of derived rows where a segment of a set remains similar or the same under transformation. These may be used as "pivots" between set forms, sometimes used by Anton Webern and Arnold Schoenberg.
Invariance describes the portions of rows which have been so designed that they remain invariant under the allowable transformations (inversion, retrograde, retrograde-inversion, multiplication). Another theorist has defined musical invariance differently, however, as "properties of a set that are preserved under [any given] operation, as well as those relationships between a set and the so-operationally transformed set that inhere in the operation", a definition very close to that of mathematical invariance. George Perle describes their use as "pivots" or non-tonal ways of emphasizing certain pitches. Invariant rows are also combinatorial and derived.
Cross partition 
A cross partition is an often monophonic or homophonic technique which, "arranges the pitch classes of an aggregate (or a row) into a rectangular design," in which the vertical columns (harmonies) of the rectangle are derived from the adjacent segments of the row and the horizontal columns (melodies) are not (and thus may contain non-adjacencies).
For example, the layout of all possible 'even' cross partitions is as follows:
62 43 34 26 ** *** **** ****** ** *** **** ****** ** *** **** ** *** ** **
One possible realization out of many for the order numbers of the 34 cross partition, and one variation of that, are:
0 3 6 9 0 5 6 e 1 4 7 t 2 3 7 t 2 5 8 e 1 4 8 9
Thus if one's tone row was 0 e 7 4 2 9 3 8 t 1 5 6, one's cross partitions from above would be:
0 4 3 1 0 9 3 6 e 2 8 5 7 4 8 5 7 9 t 6 e 2 t 1
See also 
In practice, the "rules" of twelve-tone technique have been bent and broken many times, not least by Schoenberg himself. For instance, in some pieces two or more tone rows may be heard progressing at once, or there may be parts of a composition which are written freely, without recourse to the twelve-tone technique at all. Offshoots or variations may produce music in which:
- the full chromatic is used and constantly circulates, but permutational devices are ignored
- permutational devices are used but not on the full chromatic
Also, some composers, including Stravinsky, have used cyclic permutation, or rotation, where the row is taken in order but using a different starting note. Stravinsky also preferred the inverse-retrograde, IR, to the retrograde-inverse, RI.
Although usually atonal, twelve tone music need not be—several pieces by Berg, for instance, have tonal elements.
One of the best known twelve-note compositions is Variations for Orchestra by Arnold Schoenberg. "Quiet", in Leonard Bernstein's Candide, satirizes the method by using it for a song about boredom, and Benjamin Britten used a twelve-tone row—a "tema seriale con fuga"—in his Cantata Academica: Carmen Basiliense (1959) as an emblem of academicism.
Schoenberg's mature practice 
Ten features of Schoenberg's mature twelve-tone practice are characteristic, interdependent, and interactive:
- Hexachordal inversional combinatoriality
- Linear set presentation
- Isomorphic partitioning
- Hexachordal levels
- Harmony, "consistent with and derived from the properties of the referential set"
- Metre, established through "pitch-relational characteristics"
- Multidimensional set presentations.
See also 
- List of dodecaphonic and serial compositions
- All-interval twelve-tone row
- All-interval hexachord
- All-interval tetrachord
- Pitch interval
- Whittall 2008, 26.
- Perle 1991, 145.
- Perle 1977, 2.
- Schoenberg 1975, 218.
- Whittall 2008, 25.
- Leeuw 2005, 149.
- Leeuw 2005, 155–57.
- Schoenberg 1975, 213.
- Perle 1977, 9–10.
- Perle 1977, 37.
- Neighbour 1955, 53.
- John Covach quoted in Whittall 2008, 24.
- Whittall 2008, 24.
- Reti 1958,[page needed]
- Chase 1987, 587.
- Perle 1977, 3.
- Whittall 2008, 52.
- Loy 2007,[full citation needed] 310.
- Sloan 1989, 204.
- Haimo 1990, 27.
- Perle 1977, 91–93.
- Babbitt 1960, 249–50.
- Alegant 2010, 20.
- Alegant 2010, 21.
- Alegant 2010, 22 and 24.
- Brett 2007.
- Haimo 1990, 41.
- Alegant, Brian. 2010. The Twelve-Tone Music of Luigi Dallapiccola. Eastman Studies in Music 76. Rochester, NY: University of Rochester Press. ISBN 978-1-58046-325-6.
- Babbitt, Milton. 1960. "Twelve-Tone Invariants as Compositional Determinants". Musical Quarterly 46, no. 2, Special Issue: Problems of Modern Music: The Princeton Seminar in Advanced Musical Studies (April): 246–59.
- Babbitt, Milton. 1961. "Set Structure as a Compositional Determinant". Journal of Music Theory 5, no. 1 (Spring): 72–94.
- Brett, Philip. "Britten, Benjamin." Grove Music Online ed. L. Macy (Accessed 8 January 2007), http://www.grovemusic.com.
- Chase, Gilbert. 1987. America's Music: From the Pilgrims to the Present, revised third edition. Music in American Life. Urbana: University of Illinois Press. ISBN 0-252-00454-X (cloth); ISBN 0-252-06275-2 (pbk).
- Haimo, Ethan. 1990. Schoenberg's Serial Odyssey: The Evolution of his Twelve-Tone Method, 1914–1928. Oxford [England] Clarendon Press; New York: Oxford University Press ISBN 0-19-315260-6.
- Hill, Richard S. 1936. "Schoenberg's Tone-Rows and the Tonal System of the Future". Musical Quarterly 22, no. 1 (January): 14–37.
- Lansky, Paul, George Perle, and Dave Headlam. 2001. "Twelve-note Composition". The New Grove Dictionary of Music and Musicians, second edition, edited by Stanley Sadie and John Tyrrell. London: Macmillan Publishers.
- Leeuw, Ton de. 2005. Music of the Twentieth Century: A Study of Its Elements and Structure, translated from the Dutch by Stephen Taylor. Amsterdam: Amsterdam University Press. ISBN 90-5356-765-8. Translation of Muziek van de twintigste eeuw: een onderzoek naar haar elementen en structuur. Utrecht: Oosthoek, 1964. Third impression, Utrecht: Bohn, Scheltema & Holkema, 1977. ISBN 90-313-0244-9.
- Loy, D. Gareth, 2007. Musimathics: The Mathematical Foundations of Music, Vol. 1. Cambridge, Mass. and London: MIT Press. ISBN 9780262122825.
- Neighbour, Oliver. 1955. "The Evolution of Twelve-Note Music". Proceedings of the Royal Musical Association, 81st Sess. (1954–1955): 49–61.
- Perle, George. 1977. Serial Composition and Atonality: An Introduction to the Music of Schoenberg, Berg, and Webern, fourth edition, revised. Berkeley, Los Angeles, and London: University of California Press. ISBN 0-520-03395-7
- Perle, George. 1991. Serial Composition and Atonality: An Introduction to the Music of Schoenberg, Berg, and Webern, sixth edition, revised. Berkeley: University of California Press. ISBN 978-0-520-07430-9.
- Reti, Rudolph. 1958. Tonality, Atonality, Pantonality: A Study of Some Trends in Twentieth Century Music. Westport, Connecticut: Greenwood Press. ISBN 0-313-20478-0.
- Rufer, Josef. 1954. Composition with Twelve Notes Related Only to One Another, translated by Humphrey Searle. New York: The Macmillan Company. (Original German ed., 1952)
- Schoenberg, Arnold. 1975. Style and Idea, edited by Leonard Stein with translations by Leo Black. Berkeley & Los Angeles: University of California Press. ISBN 0-520-05294-3.
- 207–208 "Twelve-Tone Composition (1923)"
- 214–45 "Composition with Twelve Tones (1) (1941)"
- 245–49 "Composition with Twelve Tones (2) (c.1948)"
- Solomon, Larry. 1973. "New Symmetric Transformations", Perspectives of New Music 11, no. 2 (Spring-Summer): 257–64.
- Whittall, Arnold. 2008. The Cambridge Introduction to Serialism. Cambridge Introductions to Music. New York: Cambridge University Press. ISBN 978-0-521-86341-4 (cloth) ISBN 978-0-521-68200-8 (pbk).
Further reading 
- Covach, John. 1996. "The Zwölftonspiel of Josef Matthias Hauer". Journal of Music Theory 36, no. 1 (Spring): 149–84.
- Covach, John. 2000. "Schoenberg's 'Poetics of Music', the Twelve-tone Method, and the Musical Idea". In Schoenberg and Words: The Modernist Years, edited by Russell A. Berman and Charlotte M. Cross, New York: Garland. ISBN 0-8153-2830-3
- Covach, John. 2002, "Twelve-tone Theory". In The Cambridge History of Western Music Theory, edited by Thomas Christensen, 603–27. Cambridge: Cambridge University Press. ISBN 0-521-62371-5.
- Šedivý, Dominik. 2011. Serial Composition and Tonality. An Introduction to the Music of Hauer and Steinbauer, edited by Günther Friesinger, Helmut Neumann and Dominik Šedivý. Vienna: edition mono. ISBN 3-902796-03-0
- Sloan, Susan L. 1989. "Archival Exhibit: Schoenberg’s Dodecaphonic Devices". Journal of the Arnold Schoenberg Institute 12, no. 2 (November): 202–205.
- Starr, Daniel. 1978. "Sets, Invariance and Partitions". Journal of Music Theory 22, no. 1 (Spring): 1–42.
- Wuorinen, Charles. 1979. Simple Composition. New York: Longman. ISBN 0-582-28059-1. Reprinted 1991, New York: C. F. Peters. ISBN 0-938856-06-5.
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