1029/1024: Difference between revisions

Another way to get it — seems that a 2.3.7 equivalence continuum anchored to 41EDO should be lurking around here
Expand & misc. cleanup
 
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{{Interwiki
| en = 1029/1024
| de = 1029/1024
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{{Infobox Interval
{{Infobox Interval
| Name = slendric comma, gamelisma, gamelan residue
| Name = slendric comma, gamelisma, gamelan residue
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| Comma = yes
| Comma = yes
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}}
{{interwiki
'''1029/1024''', the '''slendric comma''' or '''gamelisma''', is a [[small comma|small]] [[7-limit]] (also [[2.3.7 subgroup|2.3.7-subgroup]]) [[comma]] measuring about 8.4 [[cent]]s. It is the amount by which a stack of three [[8/7]]'s falls short of [[3/2]], and the ratio between [[49/48]] ({{S|7}}) and [[64/63]] ({{S|8}}), which gives it the [[S-expression]] of S7/S8, making it an ultraparticular comma.  
| de = 1029/1024
| en = 1029/1024
}}
'''1029/1024''', the '''slendric comma''' or '''gamelisma''', is a [[small comma|small]] [[7-limit]] (also 2.3.7-[[subgroup]]) [[comma]] measuring about 8.4 [[cent]]s. It is the amount by which a stack of three [[8/7]]'s falls short of [[3/2]], and the ratio between S7 = [[49/48]] and S8 = [[64/63]], which gives it the [[S-expression]] of S7/S8, making it an ultraparticular comma. It is also the amount by which a stack of three [[garischisma]]s falls short of a [[countercomp comma]].


== Commatic relations ==
== Commatic relations ==
This comma factorizes into [[superparticular]]s as:
This comma is the difference between a [[Pythagorean limma]] and a stack of three septimal commas, as well as the difference between a [[Pythagorean countercomma]] and a stack of three [[septimal schisma]]s.
* [[217/216]] × [[3969/3968]] (subgroup: [[31-limit|2.3.7.31]])
 
* [[225/224]] × [[2401/2400]] (subgroup: [[7-limit|2.3.5.7]])
In the full 7-limit it factorizes into [[superparticular]]s as ([[225/224]])⋅([[2401/2400]]). It also factorizes into the following constituent superparticulars in the higher limits:
* [[273/272]] × [[833/832]] (subgroup: [[17-limit|2.3.7.13.17]])
* [[385/384]] and [[441/440]] (subgroup: 2.3.5.7.11)
* [[343/342]] × [[513/512]] (subgroup: [[19-limit|2.3.7.19]])
* [[343/342]] and [[513/512]] (subgroup: 2.3.7.19)
* [[385/384]] × [[441/440]] (subgroup: [[11-limit|2.3.5.7.11]]).
* [[273/272]] and [[833/832]] (subgroup: 2.3.7.13.17)
* [[217/216]] and [[3969/3968]] (subgroup: 2.3.7.31)


Tempering out these constituent commas adds new intervals (outside of the 2.3.7 subgroup) to the chain of 8/7s while doing minimal additional damage to 2.3.7 itself.
Tempering out these constituent commas adds new intervals (outside of the 2.3.7 subgroup) to the chain of 8/7's while doing minimal additional damage to 2.3.7 itself.


== Temperaments ==
== Temperaments ==
Tempering out this comma alone in the [[2.3.7 subgroup]] leads to the rank-2 [[slendric]] temperament, or in the full 7-limit, the rank-3 [[gamelismic]] temperament. In either case, it enables the [[slendric pentad]], and the perfect fifth is split into three equal parts, one for 8/7 and two for [[21/16]]. In addition, the [[256/243|Pythagorean limma (256/243)]] is also split into three, one for 64/63[[~]]49/48 and two for [[28/27]]. It therefore provides the little interval known as a [[quark]].
[[Tempering out]] this comma alone in the 2.3.7 subgroup leads to the rank-2 [[slendric]] temperament, or in the full 7-limit, the rank-3 [[gamelismic]] temperament. In either case, it enables the [[slendric pentad]], and the perfect fifth is split into three equal parts, one for 8/7 and two for [[21/16]]. In addition, the Pythagorean limma is also split into three, one for 64/63[[~]]49/48 and two for [[28/27]]. It therefore provides the little interval known as a [[quark]].


See [[Gamelismic family]] for the rank-3 family where it is tempered out. See [[Gamelismic clan]] for the rank-2 clan where it is tempered out.  
See [[Gamelismic family]] for the rank-3 family where it is tempered out. See [[Gamelismic clan]] for the rank-2 clan where it is tempered out.