diminished octave
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English[edit]
Noun[edit]
diminished octave (plural diminished octaves)
- (music) A musical interval in Western music formed by narrowing an octave by a chromatic semitone. It is one chromatic semitone narrower than a perfect octave. In twelve-tone equal temperament, it consists of eleven semitones, spanning eight degrees of the diatonic scale, and is enharmonically equivalent to a major seventh.