Diminished octave

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diminished octave

Inverse	augmented unison
Name
Other names	-
Abbreviation	d8
Size
Semitones	11
Interval class	1
Just interval	48:25
Cents
Equal temperament	1100
Just intonation	1129

In music, a diminished octave is an interval that spans eight diatonic scale degrees.

It is narrower than a perfect octave by a chromatic semitone.

v • d • e Intervals Perfect unison (0) · fourth (5) · fifth (7) · octave (12) Major second (2) · third (4) · sixth (9) · seventh (11) Minor second (1) · third (3) · sixth (8) · seventh (10) Augmented unison (1) · second (3) · third (5) · fourth (6) · fifth (8) · sixth (10) · seventh (12) Diminished second (0) · third (2) · fourth (4) · fifth (6) · sixth (7) · seventh (9) · octave (11) Septimal major (supermajor) second (2½) · third (4½) · sixth (9½) · seventh (11½) Neutral second (1½) · third (3½) · sixth (8½) · seventh (10½) Septimal minor (subminor) second (½) · third (2½) · sixth (7½) · seventh (9½) Semitones are given in brackets. Fractional semitones are approximate.