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In classical music, musical development is a process by which a musical idea is communicated in the course of a composition. It refers to the transformation and restatement of initial material, and is often contrasted with musical variation, which is a slightly different means to the same end. ''Development'' is carried out upon portions of material treated in many ''different'' presentations and combinations at a time, while ''variation'' depends upon ''one'' type of presentation at a time.〔Wennerstrom, Mary (1975). "Form in Twentieth-Century Music" (chap. 1), ''Aspects of Twentieth-Century Music''. Wittlich, Gary (ed.). Englewood Cliffs, New Jersey: Prentice-Hall. ISBN 0-13-049346-5.〕 In this process, certain central ideas are repeated in different contexts or in altered form so that the mind of the listener consciously or unconsciously compares the various incarnations of these ideas. Listeners may apprehend a "tension between expected and real results" (see irony), which is one "element of surprise" in music. This practice has its roots in counterpoint, where a theme or subject might create an impression of a pleasing or affective sort, but would go on to delight the mind further as its contrapuntal capabilities are gradually unveiled. The musical form which traditionally exploits development to the fullest is the sonata. In this form there is a section after the ''exposition'' and before the ''recapitulation'' where material from the exposition section is developed. In some older texts this development section may be referred to as "free fantasia." ==See also== *Developing variation *Fugue#The development *Secondary development *Sequence (music) 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Musical development」の詳細全文を読む スポンサード リンク
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