5632/5625: Difference between revisions

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'''5632/5625''', the '''vishdelisma''' or '''vishdelic comma''', is an [[unnoticeable comma|unnoticeable]] [[11-limit]] (specifically [[2.3.5.11 subgroup|2.3.5.11-subgroup]]) [[comma]] with a size of about 2.15 [[cent]]s. It is the amount that the [[11/1|11th harmonic]] overshoots two [[3/2|perfect fifths]], four [[5/4|major thirds]], and an [[octave]] combined. It is also the amount by which four major thirds falls short of [[11/9]] plus an octave. It is tempered out in 11-limit extensions of temperaments such as [[vishnu]], [[grendel]], [[quasiorwell]], [[hemithirds]], and [[decoid]].
'''5632/5625''', the '''vishdelisma''' or '''vishdelic comma''', is an [[unnoticeable comma|unnoticeable]] [[11-limit]] (specifically [[2.3.5.11 subgroup|2.3.5.11-subgroup]]) [[comma]] with a size of about 2.15 [[cent]]s. It is the amount by which a stack of four [[5/4]] major thirds falls short of [[11/9]] plus an [[octave]]. Equivalently, it is the amount by which [[11/8]] overshoots a stack of two [[75/64]] classical augmented seconds.
 
In terms of other commas, it is the difference between [[176/175]] and [[225/224]]. In the [[13-limit]], it equals ([[676/675]])/([[4225/4224]]) and factors as ([[1001/1000]])⋅([[4096/4095]]). In the [[19-limit]] it factors as ([[1216/1215]])⋅([[2376/2375]]).  


== Temperaments ==
== Temperaments ==
[[Tempering out]] this comma in the full 11-limit gives the rank-4 [[vishdelismic]] temperament, or in the 2.3.5.11 subgroup, the rank-3 '''vishdelic''' temperament.  
[[Tempering out]] this comma in the full 11-limit gives the rank-4 [[vishdelismic]] temperament, or in the 2.3.5.11 subgroup, the rank-3 '''vishdelic''' temperament. It is tempered out in 11-limit extensions of temperaments such as [[vishnu]], [[grendel]], [[quasiorwell]], [[hemithirds]], and [[decoid]].  
 
=== Vishdelic ===
[[Subgroup]]: 2.3.5.11
 
[[Comma list]]: 5632/5625
 
{{Mapping|legend=1| 1 0 0 -9 | 0 1 0 2 | 0 0 1 4 }}
: mapping generators: ~2, ~3, ~5
 
[[Optimal tuning]]s:
* [[WE]]: ~2 = 1199.8976{{c}}, ~3/2 = 702.1145{{c}}, ~5/4 = 386.7638{{c}}
: [[error map]]: {{val| -0.102 +0.057 +0.245 -0.136 }}
* [[CWE]]: ~2 = 1200.0000{{c}}, ~3/2 = 702.1309{{c}}, ~5/4 = 386.7770{{c}}
: error map: {{val| 0.000 +0.176 +0.463 +0.052 }}
 
{{Optimal ET sequence|legend=1| 31, 34, 53, 65, 87, 118, 152, 270, 335, 605, 940, 1092, 1362c, 1697c, 2302c }}


[[Badness]] (Sintel): 0.183
See [[Vishdelismic clan]] for the [[clan of temperaments]] where it is tempered out.  


[[Category:Vishdelismic]]
[[Category:Vishdelismic]]
[[Category:Commas named by combining multiple temperament names]]
[[Category:Commas named by combining multiple temperament names]]

Latest revision as of 12:21, 8 September 2026

Interval information
Ratio 5632/5625
Factorization 29 × 3-2 × 5-4 × 11
Monzo [9 -2 -4 0 1
Size in cents 2.153085 ¢
Names vishdelisma,
vishdelic comma
Color name s1og42, saloquadgu 2nd
FJS name [math]\displaystyle{ \text{dd2}^{11}_{5,5,5,5} }[/math]
Special properties reduced
Tenney norm (log2 nd) 24.9171
Weil norm (log2 max(n, d)) 24.9189
Wilson norm (sopfr(nd)) 55
Comma size unnoticeable
Open this interval in xen-calc

5632/5625, the vishdelisma or vishdelic comma, is an unnoticeable 11-limit (specifically 2.3.5.11-subgroup) comma with a size of about 2.15 cents. It is the amount by which a stack of four 5/4 major thirds falls short of 11/9 plus an octave. Equivalently, it is the amount by which 11/8 overshoots a stack of two 75/64 classical augmented seconds.

In terms of other commas, it is the difference between 176/175 and 225/224. In the 13-limit, it equals (676/675)/(4225/4224) and factors as (1001/1000)⋅(4096/4095). In the 19-limit it factors as (1216/1215)⋅(2376/2375).

Temperaments

Tempering out this comma in the full 11-limit gives the rank-4 vishdelismic temperament, or in the 2.3.5.11 subgroup, the rank-3 vishdelic temperament. It is tempered out in 11-limit extensions of temperaments such as vishnu, grendel, quasiorwell, hemithirds, and decoid.

See Vishdelismic clan for the clan of temperaments where it is tempered out.