Nanisma: Difference between revisions

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'''Nanisma''' ({{monzo|legend=1| 109 -67 0 -1 }}) is a no-five [[7-limit]] [[unnoticeable comma]] measuring about 0.189 [[cent]]s in size. It is the tiny interval between the pythagorean ratio {{monzo| 107 -67 }} and the harmonic minor-7th of ratio [[7/4]].
The '''nanisma''' ({{monzo|legend=1| 109 -67 0 -1 }}) is an [[unnoticeable comma|unnoticeable]] [[7-limit]] (also [[2.3.7 subgroup|2.3.7-subgroup]]) [[comma]] measuring about 0.189 [[cent]]s. It is the tiny interval between the pythagorean ratio {{monzo| 107 -67 }} and the harmonic minor seventh of ratio [[7/4]].


The nanisma is considered as a 3=7 [[xenharmonic bridge]]. It also describes the difference between {{monzo| 108 -68 }} (a stack of four [[17-comma]]s) and the septimal minor third of ratio [[7/6]], and also the difference between {{monzo| -109 69 }} and the wide septimal major third of ratio [[9/7]]. It can also be thought of as the difference between [[Mercator's comma]] and the [[garischisma]].
The nanisma is considered as a 3=7 [[xenharmonic bridge]]. It also describes the difference between {{monzo| 108 -68 }} (a stack of four [[17-comma]]s) and the septimal minor third of ratio [[7/6]], and also the difference between {{monzo| -109 69 }} and the wide septimal major third of ratio [[9/7]]. It can also be thought of as the difference between [[Mercator's comma]] and the [[garischisma]].


== Temperaments ==
== Temperaments ==
The nanisma is tempered out in such notable edos as {{EDOs| 306, 612, 1277, 1583, 2860, 4137, 4802, 5414, 6079, 6691, 11493, 12105, and 12770 }}, leading to the '''nanismic temperament''', in which sixty-seven fifths make up a septimal whole tone [[8/7]] with octave reduction.
The nanisma is tempered out in such notable [[edo]]s as {{EDOs| 306, 612, 1277, 1583, 2860, 4137, 4802, 5414, 6079, 6691, 11493, 12105, and 12770 }}, leading to the '''nanismic temperament''', in which sixty-seven fifths make up a septimal whole tone [[8/7]] with octave reduction.
 
=== Nanic ===
See [[Very high accuracy temperaments #Nanic]].  


=== Nanismic ===
=== Nanismic ===
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: sval mapping generators: ~2, ~3, ~5
: sval mapping generators: ~2, ~3, ~5


[[Optimal tuning]] ([[CTE]]): ~2 = 1\1, ~3/2 = 701.9578, ~5/4 = 386.3137
[[Optimal tuning]] ([[CTE]]): ~2 = 1200.0000, ~3/2 = 701.9578, ~5/4 = 386.3137


{{Optimal ET sequence|legend=1| 53, 147d, 200, 253, 306c, 359, 412, 506d, 559, 612, 1277, 1889, 3525, 4137, 4190, 4802, 5414, 6079, 6691, 18184, 24875, 92809, 117684, 142559 }}
{{Optimal ET sequence|legend=1| 53, 147d, 200, 253, 306c, 359, 412, 506d, 559, 612, 1277, 1889, 3525, 4137, 4190, 4802, 5414, 6079, 6691, 18184, 24875, 92809, 117684, 142559 }}


[[Badness]]: 6.09 × 10<sup>-3</sup>
[[Badness]]: 6.09 × 10<sup>-3</sup>
=== Nanic ===
[[Subgroup]]: 2.3.7
[[Comma list]]: {{monzo| 109 -67 -1 }}
{{Mapping|legend=2| 1 0 109 | 0 1 -67 }}
: sval mapping generators: ~2, ~3
[[Optimal tuning]] ([[CTE]]): ~2 = 1\1, ~3/2 = 701.9578
{{Optimal ET sequence|legend=1| 53, 200, 253, 306, 665, 971, 1277, 6691, 7968, 9245, 10522, 11799, 13076, 40505, 53581, 66657, 79733 }}
[[Badness]]: 0.0138


== Etymology ==
== Etymology ==
This comma was named by [[Margo Schulter]] in 2002<ref>[https://yahootuninggroupsultimatebackup.github.io/tuning/topicId_38852.html#38854 Yahoo! Tuning Group | ''Proposal: a high-order septimal schisma'']</ref>.
This comma was named by [[Margo Schulter]] in 2002<ref>[https://yahootuninggroupsultimatebackup.github.io/tuning/topicId_38852.html#38854 Yahoo! Tuning Group | ''Proposal: a high-order septimal schisma'']</ref>.
== See also ==
* [[Unnoticeable comma]]


== External links ==
== External links ==
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[[Category:Nanismic]]
[[Category:Nanismic]]
[[Category:Commas with unknown etymology]]