a semitone
31Comma (music) — Syntonic comma on C  Play ( …
32Diminished second — Inverse augmented seventh Name Other names Abbreviation d2[1] Size …
33Septimal kleisma — 16:15 diatonic semitone. 16:15 diatonic semit …
34Diatonic and chromatic — Chromatic redirects here. For other uses, see Chromatic (disambiguation). Melodies may be based on a diatonic scale and maintain its tonal characteristics but contain many accidentals up to all twelve tones of the chromatic scale, such as the… …
35Pythagorean interval — In musical tuning theory, a Pythagorean interval is a musical interval with frequency ratio equal to a power of two divided by a power of three, or vice versa. For instance, the perfect fifth with ratio 3/2 (equivalent to 31/21) and the perfect… …
36Musical mode — This article is about modes as used in music. For other uses, see Mode (disambiguation). Modern Dorian mode on C  Play …
37Accidental (music) — In music, an accidental is a note whose pitch (or pitch class) is not a member of a scale or mode indicated by the most recently applied key signature. In musical notation, the symbols used to mark such notes, sharps (music|sharp), flats… …
38Microtonal music — Composer Charles Ives chose the chord above as good possibility for a fundamental chord in the quarter tone scale, akin not to the tonic but to the major chord of traditional tonality.(Boatright 1971, 8 9)   …
39Perfect fifth —  Play (help· …
40Pythagorean comma — (PC) defined in Pythagorean tuning as difference between semitones (A1–m2), or interval between enharmonically equivalent notes (from D♭ to C♯). The di …
