Nanisma: Difference between revisions
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''' | 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 | 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 = | [[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> | ||
== 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>. | ||
== External links == | == External links == | ||
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[[Category:Nanismic]] | [[Category:Nanismic]] | ||
[[Category:Commas with unknown etymology]] |