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| | Paul Rapoport: About 31-tone equal temperament |
 | | Correspondingly, the diminished fifth, being the harmonic inversion of the augmented fourth, is 1.867 cents sharper in 31-tone equal temperament than 7:10, while in 12-tone equal temperament, the diminished fifth, which is the same as its augmented fourth, is 17.488 cents flatter. |
 | | It should also be noted that in meantone tuning, as in 31-tone and 12-tone equal temperament, the major third is divided exactly in half by the major second: the major third comprises four perfect fifths, and the major second two of them. |
 | | The sesqui-augmented and sesqui-diminished intervals are one diesis larger than augmented and diminished intervals respectively: D up to A |
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