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| The '''diesis''' (precisely the '''mosdiesis''') of a [[mos scale]] is the interval that is the difference between two enharmonic notes, i.e. the diminished mosstep or the negative diminished mosstep, whichever is positive. In [[soft]] (L:s < 2:1) scales, it is the diminished mosstep. In [[hard]] (L:s > 2:1) scales, it is the negative diminished mosstep, since the diminished mosstep itself is negative. In basic (L:s = 2:1) scales, it [[vanish]]es.
| | #redirect [[Diesis #As a diatonic interval category]] |
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| In meantone tunings (including [[12edo]]), the diesis or ''enharmonic diesis'' in the [[diatonic scale]] is the diminished second or the negative diminished second, whichever is positive. For example, the interval of C♯ – D♭.
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| If the fifth approximates the just interval [[3/2]], then the diesis or the negative diesis approximates the [[Pythagorean comma]]. In [[meantone]], the diesis also approximates [[128/125]], the augmented comma, which traditionally goes by the name of ''diesis''.
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| == See also ==
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| * [[Diesis]] (disambiguation page)
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| [[Category:Terms]]
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| [[Category:MOS scale]]
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