augmented octave

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English[edit]

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Noun[edit]

augmented octave (plural augmented octaves)

  1. (music) A musical interval of the Western twelve-semitone system consisting of thirteen semitones and spanning eight degrees of the diatonic scale. It is one semitone wider than a perfect octave and enharmonically equivalent to a minor ninth/compound minor second.
    An augmented octave on C:
    <c'cis''>1
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