Diaschisma: Difference between revisions

+wikipedia box; integrate the links to diaschismic temperaments to the temperaments section
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m Reason for the name.
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{{Wikipedia| Diaschisma }}
{{Wikipedia| Diaschisma }}


'''2048/2025''', the '''diaschisma''', a [[comma]] of 19.553 [[cent]]s, is the difference between four [[3/2|just perfect fifths]] plus two [[5/4|just major thirds]] and three octaves. It may also be defined as the difference between a Pythagorean minor seventh ([[16/9]]) and a just augmented sixth ([[225/128]]), as the difference between two classic diatonic semitones ([[16/15]]) and the major whole tone ([[9/8]]), that is, (9/8)/(16/15)<sup>2</sup>, or as the difference between the 5-limit tritone [[45/32]] and its octave complement [[64/45]].
'''2048/2025''', the '''diaschisma''', a [[comma]] of 19.553 [[cent]]s, is the size of a [[pythagorean comma]] minus two [[schisma|schismas]], from which it derives its name. It may also be defined as the difference between four [[3/2|just perfect fifths]] plus two [[5/4|just major thirds]] and three octaves, the difference between a Pythagorean minor seventh ([[16/9]]) and a just augmented sixth ([[225/128]]), as the difference between two classic diatonic semitones ([[16/15]]) and the major whole tone ([[9/8]]), that is, (9/8)/(16/15)<sup>2</sup>, or as the difference between the 5-limit tritone [[45/32]] and its octave complement [[64/45]].


== Temperaments ==
== Temperaments ==