Delta scale
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.'"[1] 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[2]:
- 1:1
- 25:21
- 9:7
- 75:49
- 5:3
- 9:5
- 15:7
- 7:3
- 25:9
- 3:1
See also
Further reading
Sources
- ^ Taruskin, Richard (1996). Stravinsky and the Russian Traditions: A Biography of the Works through Mavra, p.1394. ISBN 978-0-520-07099-8.
- ^ "What about BP tonality?", The Bohlen-Pierce Site.
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