5632/5625: Difference between revisions

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The '''vishdel comma''' is an [[11-limit]] [[unnoticeable comma]] with a ratio of '''5632/5625''', a monzo of {{monzo| 9 -2 -4 0 1 }}, and a size of 2.1531 [[cent]]s. It is the amount that the [[11/1|eleventh harmonic]] overshoots two [[3/2|perfect fifths]], four [[5/4|major thirds]], and an [[2/1|octave]] combined. It is tempered out in 11-limit extensions of temperaments such as [[vishnu]], [[grendel]], [[quasiorwell]], [[hemithirds]], and [[decoid]].
The '''vishdel comma''' is an [[11-limit]] [[unnoticeable comma]] with a ratio of '''5632/5625''', a monzo of {{monzo| 9 -2 -4 0 1 }}, and a size of 2.1531 [[cent]]s. It is the amount that the [[11/1|eleventh harmonic]] overshoots two [[3/2|perfect fifths]], four [[5/4|major thirds]], and an [[2/1|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]].


== Temperament ==
== Temperament ==

Latest revision as of 03:40, 30 October 2025

Interval information
Ratio 5632/5625
Factorization 29 × 3-2 × 5-4 × 11
Monzo [9 -2 -4 0 1
Size in cents 2.153085¢
Name vishdel 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

The vishdel comma is an 11-limit unnoticeable comma with a ratio of 5632/5625, a monzo of [9 -2 -4 0 1, and a size of 2.1531 cents. It is the amount that the eleventh harmonic overshoots two perfect fifths, four 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.

Temperament

Tempering this comma out in the full 11-limit gives the rank-4 vishdel temperament. Below is the rank-3 subgroup temperament as the vishdel comma doesn't have any 7's.

118 & 65 & 152

Subgroup: 2.3.5.11

Comma list: 5632/5625

Mapping: [1 0 0 -9], 0 1 0 2], 0 0 1 4]]

POTE generators: ~3/2 = 702.1744, ~5/4 = 386.7968

Optimal ET sequence31, 34, 53, 65, 87, 118, 152, 183, 217, 270

See also