174edo: Difference between revisions

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Created page with "'''174edo''' is the equal division of the octave into 174 parts of 6.8966 cents each. It is closely related to 87edo, but the patent vals differ on the mapping for..."
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'''174edo''' is the [[EDO|equal division of the octave]] into 174 parts of 6.8966 cents each. It is closely related to [[87edo]], but the patent vals differ on the mapping for 17 and some higher primes. It is contorted in the 13-limit, tempering out 196/195, 245/243, 352/351, 364/363, and 625/624. Using the patent val, it tempers out 289/288 in the 17-limit; 361/360, 476/475, and 665/663 in the 19-limit; 391/390, 392/391, 460/459, 529/528, and 760/759 in the 23-limit; 1309/1305, 1450/1449, and 4147/4140 in the 29-limit; 496/495 and 1365/1364 in the 31-limit.
{{Infobox ET}}
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[[Category:Edo]]
== Theory ==
174edo is closely related to [[87edo]], but the [[patent val]]s differ on the mapping for [[17/1|17]] and some higher primes. It is [[contorted]] in the 13-limit, [[tempering out]] [[196/195]], [[245/243]], [[352/351]], [[364/363]], and [[625/624]]. Using the patent val, it tempers out [[289/288]] in the 17-limit; [[361/360]], [[476/475]], and 665/663 in the 19-limit; [[391/390]], [[392/391]], [[460/459]], [[529/528]], and [[760/759]] in the 23-limit; 1309/1305, 1450/1449, and 4147/4140 in the 29-limit; 496/495 and 1365/1364 in the 31-limit.
 
The 174b val flat fifth is a meantone fifth very close to the [[quarter-comma meantone]] fifth, being only 0.027 cents flat of it.
 
=== Odd harmonics ===
{{Harmonics in equal|174}}
 
=== Subsets and supersets ===
Since 174 factors into primes as {{nowrap| 2 × 3 × 29 }}, 174edo has subset edos {{EDOs| 2, 3, 6, 29, 58, and 87 }}.
 
== Intervals ==
{{Interval table}}