In music composition, developing variation is a formal technique in which the concepts of development and variation are united in that variations are produced through the development of existing material.
Music of the homophonic-melodic style of composition, that is, music with a main theme, accompanied by and based on harmony, produces its material by, as I call it, developing variation. This means that variation of the features of a basic unit produces all the thematic formulations which provide for fluency, contrasts, variety, logic and unity, on the one hand, and character, mood, expression, and every needed differentiation, on the other hand--thus elaborating the idea of the piece.
Schoenberg distinguished this from the "unravelling" procedures of contrapuntal tonal music but developing variation may be related to other textures and to Schoenberg's own freely atonal pieces which employ a "method of atonal developing variation each chord, line, and harmony results from the subtle alteration and recombination of musical ideas from earlier in the piece" and Schoenberg describes its importance to his developmental of serialism.
Similarly, as in the case of Die Jakobsleiter, here also all main themes had to be transformations of the first phrase. Already here the basic motif was not only productive in furnishing new motif-forms through developing variations, but also in producing more remote formulations based on the unifying effect of one common factor: the repetition of tonal and intervallic relationship.
Haimo applies the concept to vertical (pitch) as well as horizontal (rhythm and permutation) transformations in twelve-tone music on the premise of "the 'unity of musical space'" after suggesting that Schoenberg reconciled serial organization and developing variation in the twelve tone technique.
- Frisch, Walter (1984). Brahms and the Principle of Developing Variation, p. 1-34. Berkeley. Cited in Haimo as developing from Schoenberg's work.
- Schoenberg, Arnold. Style and Idea, p. 397. Cited by Haimo (1990).
- Schoenberg, Arnold. Composition with Twelve Tones (2), p. 248. Cited by Haimo (1990).
- Haimo, Ethan. 1990. Schoenberg's Serial Odyssey: The Evolution of his Twelve-Tone Method, 1914-1928, p.73n8. Oxford [England] : Clarendon Press ; New York : Oxford University Press ISBN 0-19-315260-6.
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