Diminished Octave

In classical music from Western culture, a diminished octave ( Play) is an interval produced by narrowing a perfect octave by a chromatic semitone. As such, the two notes are denoted by the same letter but have different accidentals. For instance, the interval from C4 to C5 is a perfect octave, twelve semitones wide, and both the intervals from C♯4 to C5, and from C4 to C♭5 are diminished octaves, spanning eleven semitones. Being diminished, it is considered a dissonant interval.

The diminished octave is enharmonically equivalent to the major seventh.

Other articles related to "octave, diminished octave, diminished":

List Of Intervals In 5-limit Just Intonation
... The fundamental intervals are the superparticular ratios 2/1 (the octave), 3/2 (the perfect fifth) and 5/4 (the major third). 53ET commas 53ET cents Representation Complement unison 1/1 0.00 0 ... octave syntonic comma 81/80 21.51 0 c or T − t 1 22.64 semi-diminished octave diesis diminished second 128/1. 12ET Cents 53ET Commas 53ET Cents 1 unison 1/1 0.00 0. 0.00 2 octave 2/1 1200.00 53. 1200.00 3 perfect fifth 3/2 701.96 31. 701.89 5 major third 5/4 386.31 ...

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