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A prepared piano is a piano that has had its sound altered by placing objects (called ''preparations'') on or between the strings. == Technique == Although theoretically any object could be used to prepare a piano, in practical application preparation objects are usually expected to have certain characteristics: * They are applied directly to the piano strings. * They must fit in the desired location inside the piano. * They (usually) should not move from their location during playing. * They must be reversible (that is, when a properly prepared piano has been "unprepared", it should be impossible for anyone to tell that it had ever been prepared; no permanent damage is done to the piano). Additionally, most preparations will change the timbre of the string in such a way that the original pitch of the string will no longer be perceptible, though there are occasional exceptions to this.〔Bunger, Richard (1973). The Well-Prepared Piano. Colorado Springs: Colorado College Music Press〕 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「prepared piano」の詳細全文を読む スポンサード リンク
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