21afdo: Difference between revisions

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{{Infobox AFDO|steps=21}}
{{Infobox AFDO|steps=21}}


'''21afdo''' ([[AFDO|arithmetic frequency division of the octave]]), or '''21odo''' ([[otonal division]] of the octave), divides the octave into 21 parts of 1/21 each. As a scale it may be known as [[Harmonic mode|mode 21 of the harmonic series]] or the [[Overtone scale #Over-n scales|Over-21]] scale.
'''21afdo''' ([[AFDO|arithmetic frequency division of the octave]]), or '''21odo''' ([[otonal division]] of the octave), divides the octave into 21 parts of 1/21 each. It is a superset of [[20afdo]] and a subset of [[22afdo]]. As a scale it may be known as [[Harmonic mode|mode 21 of the harmonic series]] or the [[Overtone scale #Over-n scales|Over-21]] scale.

Latest revision as of 11:21, 23 February 2025

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← 20afdo 21afdo 22afdo →
Prime factorization 3 × 7
Dual sharp fifth 32/21 (729.219c)
Dual flat fifth 31/21 (674.254c)

21afdo (arithmetic frequency division of the octave), or 21odo (otonal division of the octave), divides the octave into 21 parts of 1/21 each. It is a superset of 20afdo and a subset of 22afdo. As a scale it may be known as mode 21 of the harmonic series or the Over-21 scale.