Delta scale
Minor second 
Play
Play 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 Play . 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 ( Play ) and the 9:7:5 "narrow" triad ( Play ) (rather than the conventional 4:5:6 triad). Notes include:[2]
See also
Further reading
- Bohlen, Heinz: "13 Tonstufen in der Duodezime", Acustica, vol. 39 no. 2, S. Hirzel Verlag, Stuttgart, 1978, pp. 76 – 86. (German)
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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