Sengic family: Difference between revisions
+badnesses; review optimal ET sequences |
Obvious 2.3.5.7.13 subgroup extension by 686/675 = (91/90)(196/195) |
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== Sengic == | == Sengic == | ||
Sengic is naturally a 2.3.5.7.13 subgroup temperament due to the identity 686/675 = (91/90)(196/195) and 91/90 = (169/168)(196/195). This identifies the last generator as 13/12~14/13~15/14. | |||
[[Subgroup]]: 2.3.5.7 | [[Subgroup]]: 2.3.5.7 | ||
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: mapping generators: ~2, ~3, ~15/14 | : mapping generators: ~2, ~3, ~15/14 | ||
[[Optimal tuning]] ([[ | [[Optimal tuning]] ([[CTE]]): ~2 = 1\1, ~3/2 = 703.7873, ~15/14 = 129.6451 | ||
{{Optimal ET sequence|legend=1| 9, 10, 17c, 19, 27, 46 }} | {{Optimal ET sequence|legend=1| 8d, 9, 10, 17c, 19, 27, 46 }} | ||
[[Badness]]: 0.320 × 10<sup>-3</sup> | [[Badness]]: 0.320 × 10<sup>-3</sup> | ||
[[Projection pair]]s: ~5 = 3375/686, ~7 = 675/98 to 2.3.7/5 | [[Projection pair]]s: ~5 = 3375/686, ~7 = 675/98 to 2.3.7/5 | ||
=== 2.3.5.7.13 subgroup === | |||
Subgroup: 2.3.5.7.13 | |||
Comma list: 91/90, 169/168 | |||
Sval mapping: {{mapping| 1 0 2 1 2 | 0 1 0 1 1 | 0 0 3 2 1 }} | |||
Optimal tuning (CTE): ~2 = 1\1, ~3/2 = 704.5918, ~14/13 = 129.7585 | |||
{{Optimal ET sequence|legend=1| 8d, 9, 10, 17c, 19, 27, 46, 111df, 121df }} | |||
Badness: 0.320 × 10<sup>-3</sup> | |||
== Demeter == | == Demeter == | ||