86edo: Difference between revisions

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== Theory ==

86 = 2 × 43, and the [[patent val]] is a [[contorted]] [[43edo]] in the 5-limit. In the 7-limit the patent val tempers out 6144/6125, so that it [[support]]s mohajira temperament. In the 11-limit it tempers out [[245/242]], [[540/539]] and [[4000/3993]], and in the 13-limit [[144/143]], [[196/195]] and [[676/675]]. It provides the optimal patent val for the 13-limit 9 & 86 temperament tempering out 144/143, 196/195, 245/242 and 676/675.

86 = 2 × 43, and the [[patent val]] is a [[contorted]] [[43edo]] in the 5-limit. In the 7-limit the [[patent val]] [[tempering out|tempers out]] 6144/6125, so that it [[support]]s the [[mohajira]] temperament. In the 11-limit it tempers out [[245/242]], [[540/539]] and [[4000/3993]], and in the 13-limit [[144/143]], [[196/195]] and [[676/675]]. It provides the optimal patent val for the 13-limit 9 & 86 temperament tempering out 144/143, 196/195, 245/242 and 676/675.

It is perhaps more interesting to consider the alternative 86e val, which tempers out [[121/120]] and [[243/242]] and [[support]]s 11-limit mohajira. The 86de val is a less good entry for 11-limit [[migration]]. In any case, this tuning is between [[31edo]] and [[55edo]], and replaces 43edo's lopsided placement of [[11/9]] and [[27/22]] with a true neutral third.

86edo is closely related to the [[delta scale]], which is the equal division of the [[16/15|classic diatonic semitone]] into eight parts of 13.9664 cents each.

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=== Subsets and supersets ===

86edo contains [[2edo]] and [[43edo]] as subsets. [[258edo]], which triples it, is a notable tuning.

== Interval table ==

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 == Theory ==
-= 2 × 43, and the [[patent val]] is a [[contorted]] [[43edo]] in the 5-limit. In the 7-limit the patent val tempers out 6144/6125, so that it [[support]]s mohajira temperament. In the 11-limit it tempers out [[245/242]], [[540/539]] and [[4000/3993]], and in the 13-limit [[144/143]], [[196/195]] and [[676/675]]. It provides the optimal patent val for the 13-limit 9 &amp; 86 temperament tempering out 144/143, 196/195, 245/242 and 676/675.
+= 2 × 43, and the [[patent val]] is a [[contorted]] [[43edo]] in the 5-limit. In the 7-limit the [[patent val]] [[tempering out|tempers out]] 6144/6125, so that it [[support]]s the [[mohajira]] temperament. In the 11-limit it tempers out [[245/242]], [[540/539]] and [[4000/3993]], and in the 13-limit [[144/143]], [[196/195]] and [[676/675]]. It provides the optimal patent val for the 13-limit 9 &amp; 86 temperament tempering out 144/143, 196/195, 245/242 and 676/675.
+It is perhaps more interesting to consider the alternative 86e val, which tempers out [[121/120]] and [[243/242]] and [[support]]s 11-limit mohajira. The 86de val is a less good entry for 11-limit [[migration]]. In any case, this tuning is between [[31edo]] and [[55edo]], and replaces 43edo's lopsided placement of [[11/9]] and [[27/22]] with a true neutral third.
 edo is closely related to the [[delta scale]], which is the equal division of the [[16/15|classic diatonic semitone]] into eight parts of 13.9664 cents each.
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 === Subsets and supersets ===
 edo contains [[2edo]] and [[43edo]] as subsets. [[258edo]], which triples it, is a notable tuning.
 == Interval table ==
 {{Interval table}}