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The δ (delta) scale is a non-octave repeating musical scale. It may be regarded as the beta scale's reciprocal since it is, "as far 'down' the (0 3 6 9) circle from α as β is 'up.'"〔Taruskin, Richard (1996). ''Stravinsky and the Russian Traditions: A Biography of the Works through Mavra'', p.1394. ISBN 978-0-520-07099-8.〕 As such it would split the minor second into eight equal parts of approximately 14 cents each . This would total approximately 85.7 steps per octave. The Bohlen–Pierce delta scale is based on the tritave and the 7:5:3 "wide" triad () and the 9:7:5 "narrow" triad () (rather than the conventional 4:5:6 triad). Notes include:〔("What about BP tonality?" ), ''The Bohlen-Pierce Site''.〕 :1:1 :25:21 :9:7 :75:49 :5:3 :9:5 :15:7 :7:3 :25:9 :3:1 == See also == * Alpha scale * Beta scale * Gamma scale 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「delta scale」の詳細全文を読む スポンサード リンク
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