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Encyclopedia of Microtonal Music Theory

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unit of interval measurement

[Joe Monzo]

In tuning theory, it is useful to have a small pitch interval which can be used as a logarithmic unit of measurement, to compare the sizes of different microtonal intervals. The unit most often used today is the cent, which is logarithmically 1/100 of a 12-edo semitone and 1/1200 of an octave of 2:1 ratio. Several other proposals have been advocated throughout history and in various different musical cultures, including the following (ordered by size from largest to smallest):

In addition, there is the whole series of MIDI-units (mu).

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