Septimal diatonic semitone

In music, a septimal diatonic semitone (or major diatonic semitone[1]) is the interval 15:14 Playⓘ.

The septimal diatonic semitone may be derived from the harmonic series as the interval between the fourteenth and fifteenth harmonics (B7b and B).

The septimal diatonic semitone equals a just diatonic semitone Playⓘ (16:15, or 111.73 cents) plus a septimal kleisma (the interval 225:224, or 7.71 cents).

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