468edo: Difference between revisions
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{{Infobox ET}} | {{Infobox ET}} | ||
{{ | {{ED intro}} | ||
== Theory == | == Theory == | ||
468edo is [[consistent]] to the [[13-odd-limit]] with a sharp tuning tendency and a [[2.3.7.13 subgroup]] inherited from [[234edo]]. | |||
As an equal temperament, it [[tempering out|tempers out]] the [[undim comma]] and the [[ennealimma]] in the [[5-limit]]; [[2401/2400]] and [[4375/4374]] in the [[7-limit]], [[support]]ing [[ennealimmal]]; [[3025/3024]] and [[9801/9800]] in the [[11-limit]], supporting [[hemiennealimmal]]; and [[676/675]], [[1001/1000]], [[1716/1715]], [[2080/2079]] in the [[13-limit]], supporting 13-limit hemiennealimmal. It also provides the [[optimal patent val]] for 13-limit [[unlit]]. | |||
=== Odd harmonics === | === Odd harmonics === | ||
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=== Subsets and supersets === | === Subsets and supersets === | ||
468 factors into 2<sup>2</sup> × 3<sup>2</sup> × 13, | Since 468 factors into primes as {{nowrap| 2<sup>2</sup> × 3<sup>2</sup> × 13 }}, 468edo has subset edos {{EDOs| 2, 3, 4, 6, 9, 12, 13, 18, 26, 36, 39, 52, 78, 117, 156, and 234 }}. | ||
== Regular temperament properties == | == Regular temperament properties == | ||
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! rowspan="2" | [[Comma list]] | ! rowspan="2" | [[Comma list]] | ||
! rowspan="2" | [[Mapping]] | ! rowspan="2" | [[Mapping]] | ||
! rowspan="2" | Optimal<br | ! rowspan="2" | Optimal<br>8ve stretch (¢) | ||
! colspan="2" | Tuning error | ! colspan="2" | Tuning error | ||
|- | |- | ||
! [[TE error|Absolute]] (¢) | ! [[TE error|Absolute]] (¢) | ||
! [[TE simple badness|Relative]] (%) | ! [[TE simple badness|Relative]] (%) | ||
|- | |- | ||
| 2.3.5 | | 2.3.5 | ||
| | | {{Monzo| 41 -20 -4 }}, {{monzo| 1 -27 18 }} | ||
| {{ | | {{Mapping| 468 742 1087 }} | ||
| | | −0.2524 | ||
| 0.1785 | | 0.1785 | ||
| 6.96 | | 6.96 | ||
|- | |- | ||
| 2.3.5.7 | | 2.3.5.7 | ||
| | | 2401/2400, 4375/4374, {{monzo| 34 -14 -10 3 }} | ||
| {{ | | {{Mapping| 468 742 1087 1314 }} | ||
| | | −0.2253 | ||
| 0.1615 | | 0.1615 | ||
| 6.30 | | 6.30 | ||
|- | |- | ||
| 2.3.5.7.11 | | 2.3.5.7.11 | ||
| 3025/3024, 4375/4374 | | 2401/2400, 3025/3024, 4375/4374, 5767168/5740875 | ||
| {{ | | {{Mapping| 468 742 1087 1314 1619 }} | ||
| | | −0.1782 | ||
| 0.1725 | | 0.1725 | ||
| 6.73 | | 6.73 | ||
|- | |- | ||
| 2.3.5.7.11.13 | | 2.3.5.7.11.13 | ||
| | | 676/675, 1001/1000, 1716/1715, 3025/3024, 495616/494325 | ||
| {{ | | {{Mapping| 468 742 1087 1314 1619 1732 }} | ||
| | | −0.1709 | ||
| 0.1583 | | 0.1583 | ||
| 6.17 | | 6.17 | ||
|- | |- | ||
| 2.3.5.7.11.13.17 | | 2.3.5.7.11.13.17 | ||
| | | 676/675, 1001/1000, 1156/1155, 1716/1715, 3025/3024, 7616/7605 | ||
| {{ | | {{Mapping| 468 742 1087 1314 1619 1732 1913 }} | ||
| | | −0.1526 | ||
| 0.1533 | | 0.1533 | ||
| 5.98 | | 5.98 | ||
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|+ style="font-size: 105%;" | Table of rank-2 temperaments by generator | |+ style="font-size: 105%;" | Table of rank-2 temperaments by generator | ||
|- | |- | ||
! Periods<br | ! Periods<br>per 8ve | ||
! Generator* | ! Generator* | ||
! Cents* | ! Cents* | ||
! Associated<br | ! Associated<br>ratio* | ||
! Temperaments | ! Temperaments | ||
|- | |- | ||
| Line 83: | Line 78: | ||
|- | |- | ||
| 4 | | 4 | ||
| 194\468<br | | 194\468<br>(40\468) | ||
| 497.44<br | | 497.44<br>(102.56) | ||
| 4/3<br | | 4/3<br>(35/33) | ||
| [[ | | [[Unlit]] | ||
|- | |- | ||
| 9 | | 9 | ||
| 123\468<br | | 123\468<br>(19\468) | ||
| 315.38<br | | 315.38<br>(48.72) | ||
| 6/5<br | | 6/5<br>(36/35) | ||
| [[Ennealimmal]] | | [[Ennealimmal]] | ||
|- | |- | ||
| 18 | | 18 | ||
| 97\468<br | | 97\468<br>(7\468) | ||
| 248.72<br | | 248.72<br>(17.95) | ||
| 231/200<br | | 231/200<br>(99/98) | ||
| [[Hemiennealimmal]] | | [[Hemiennealimmal]] | ||
|} | |} | ||
<nowiki />* [[Normal | <nowiki/>* [[Normal forms #Equave-reduced-generator form|Octave-reduced form]], reduced to the first half-octave, and [[normal forms #Minimal-generator form|minimal form]] in parentheses if distinct | ||