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The '''large septimal diesis''' (or '''slendro diesis'''), '''49/48''' (35.6968 [[cent]]s), is a [[superparticular]] ratio spanning the small distance between a subminor third ([[7/6]]) and a supermajor second ([[8/7]]) or between the supermajor sixth ([[12/7]]) and the harmonic seventh ([[7/4]]). It is [[tempered out]] in [[15edo]] and [[19edo]], where the two intervals are equated, and the fourth is split in a perfect half. It cannot be tempered out if all of the consonances of the 7-limit are distinct, but it can be equated with other commas; for example (49/48)/([[81/80]]) = [[245/243]], (49/48)/([[64/63]]) = 1029/1024, (49/48)/([[3125/3072]]) = [[3136/3125]], (49/48)/([[50/49]]) = [[2401/2400]], ([[128/125]])/(49/48) = 6144/6125, ([[36/35]])/(49/48) = 1728/1715. | The '''large septimal diesis''' (or '''slendro diesis'''), '''49/48''' (35.6968 [[cent]]s), is a [[superparticular]] ratio spanning the small distance between a subminor third ([[7/6]]) and a supermajor second ([[8/7]]) or between the supermajor sixth ([[12/7]]) and the harmonic seventh ([[7/4]]). It is [[tempered out]] in [[15edo]] and [[19edo]], where the two intervals are equated, and the fourth is split in a perfect half. It cannot be tempered out if all of the consonances of the 7-odd-limit are distinct, but it can be equated with other commas; for example (49/48)/([[81/80]]) = [[245/243]], (49/48)/([[64/63]]) = [[1029/1024]], (49/48)/([[3125/3072]]) = [[3136/3125]], (49/48)/([[50/49]]) = [[2401/2400]], ([[128/125]])/(49/48) = [[6144/6125]], ([[36/35]])/(49/48) = [[1728/1715]]. | ||
In classical Western music, this interval is not known as a [[comma]] as it is not tempered out in [[12edo]]. | In classical Western music, this interval is not known as a [[comma]] as it is not tempered out in [[12edo]]. | ||
== See also == | == See also == | ||
* [[Semiphore family]] | * [[Semiphore family]], the rank-3 family where it is tempered out | ||
* [[Slendro clan]] | * [[Slendro clan]], the rank-2 clan where it is tempered out | ||
* [[Medium comma]] | * [[Medium comma]] | ||
* [[List of superparticular intervals]] | * [[List of superparticular intervals]] | ||
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[[Category:Medium comma]] | [[Category:Medium comma]] | ||
[[Category:Superparticular]] | [[Category:Superparticular]] | ||
[[Category:Slendro]] | |||
[[Category:Listen]] | [[Category:Listen]] | ||
Revision as of 07:42, 19 February 2021
| Interval information |
slendro diesis
reduced
[sound info]
The large septimal diesis (or slendro diesis), 49/48 (35.6968 cents), is a superparticular ratio spanning the small distance between a subminor third (7/6) and a supermajor second (8/7) or between the supermajor sixth (12/7) and the harmonic seventh (7/4). It is tempered out in 15edo and 19edo, where the two intervals are equated, and the fourth is split in a perfect half. It cannot be tempered out if all of the consonances of the 7-odd-limit are distinct, but it can be equated with other commas; for example (49/48)/(81/80) = 245/243, (49/48)/(64/63) = 1029/1024, (49/48)/(3125/3072) = 3136/3125, (49/48)/(50/49) = 2401/2400, (128/125)/(49/48) = 6144/6125, (36/35)/(49/48) = 1728/1715.
In classical Western music, this interval is not known as a comma as it is not tempered out in 12edo.
See also
- Semiphore family, the rank-3 family where it is tempered out
- Slendro clan, the rank-2 clan where it is tempered out
- Medium comma
- List of superparticular intervals
- Gallery of just intervals
- Wikipedia: Septimal diesis