388edo: Difference between revisions
→Prime harmonics: it is consistent that far so let's show it |
Rework; cleanup; clarify the title row of the rank-2 temp table |
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== Theory == | == Theory == | ||
388edo is the first edo that is | 388edo is the first edo that is [[consistency|distinctly consistent]] through to the [[27-odd-limit]]; it is also consistent through the [[37-odd-limit]]. | ||
The equal temperament [[tempering out|tempers out]] the [[vishnuzma]], {{monzo| 23 6 -14 }}, the [[tricot comma]], {{monzo| 39 -29 3 }}, the [[minortone comma]], {{monzo| -16 35 -17 }}, and the [[Very high accuracy temperaments #Raider|raider comma]], {{monzo| 71 -99 31 }}, in the 5-limit, giving a strong tuning. It tempers out [[4375/4374]] and 235298/234375 in the 7-limit, and [[3025/3024]], [[5632/5625]] and [[9801/9800]] in the 11-limit and [[847/845]], [[1001/1000]] and [[4096/4095]] in the 13-limit. | |||
It provides the [[optimal patent val]] for the rank-5 cuthbert temperament, which tempers out [[847/845]], the cuthbert comma, and for a number of other temperaments tempering it out, e.g. [[neusec]], the 190 & 198 temperament. By tempering out cuthbert it [[support]]s [[cuthbert chords]], in addition to [[sinbadmic chords]]. | |||
=== Prime harmonics === | === Prime harmonics === | ||
{{Harmonics in equal|388|columns=12}} | {{Harmonics in equal|388|columns=12}} | ||
=== Subsets and supersets === | |||
Since 388 factors into {{factorization|388}}, 388edo has subset edos {{EDOs| 2, 4, 97, and 194 }}. | |||
== Regular temperament properties == | == Regular temperament properties == | ||
| Line 23: | Line 28: | ||
| 2.3 | | 2.3 | ||
| {{monzo| 615 -388 }} | | {{monzo| 615 -388 }} | ||
| | | {{mapping| 388 615 }} | ||
| +0.0337 | | +0.0337 | ||
| 0.0337 | | 0.0337 | ||
| Line 30: | Line 35: | ||
| 2.3.5 | | 2.3.5 | ||
| {{monzo| 23 6 -14 }}, {{monzo| 39 -29 3 }} | | {{monzo| 23 6 -14 }}, {{monzo| 39 -29 3 }} | ||
| | | {{mapping| 388 615 901 }} | ||
| -0.0633 | | -0.0633 | ||
| 0.0501 | | 0.0501 | ||
| Line 37: | Line 42: | ||
| 2.3.5.7 | | 2.3.5.7 | ||
| 4375/4374, 235298/234375, 2100875/2097152 | | 4375/4374, 235298/234375, 2100875/2097152 | ||
| | | {{mapping| 388 615 901 1089 }} | ||
| +0.0224 | | +0.0224 | ||
| 0.1546 | | 0.1546 | ||
| Line 44: | Line 49: | ||
| 2.3.5.7.11 | | 2.3.5.7.11 | ||
| 3025/3024, 4375/4374, 5632/5625, 235298/234375 | | 3025/3024, 4375/4374, 5632/5625, 235298/234375 | ||
| | | {{mapping| 388 615 901 1089 1342 }} | ||
| +0.0643 | | +0.0643 | ||
| 0.1617 | | 0.1617 | ||
| Line 51: | Line 56: | ||
| 2.3.5.7.11.13 | | 2.3.5.7.11.13 | ||
| 847/845, 1001/1000, 3025/3024, 4096/4095, 4375/4374 | | 847/845, 1001/1000, 3025/3024, 4096/4095, 4375/4374 | ||
| | | {{mapping| 388 615 901 1089 1342 1436 }} | ||
| +0.0216 | | +0.0216 | ||
| 0.1758 | | 0.1758 | ||
| Line 58: | Line 63: | ||
| 2.3.5.7.11.13.17 | | 2.3.5.7.11.13.17 | ||
| 833/832, 847/845, 1001/1000, 1089/1088, 1225/1224, 1701/1700 | | 833/832, 847/845, 1001/1000, 1089/1088, 1225/1224, 1701/1700 | ||
| | | {{mapping| 388 615 901 1089 1342 1436 1586 }} | ||
| +0.0116 | | +0.0116 | ||
| 0.1646 | | 0.1646 | ||
| Line 65: | Line 70: | ||
| 2.3.5.7.11.13.17.19 | | 2.3.5.7.11.13.17.19 | ||
| 833/832, 847/845, 1001/1000, 1089/1088, 1216/1215, 1225/1224, 1331/1330 | | 833/832, 847/845, 1001/1000, 1089/1088, 1216/1215, 1225/1224, 1331/1330 | ||
| | | {{mapping| 388 615 901 1089 1342 1436 1586 1648 }} | ||
| +0.0280 | | +0.0280 | ||
| 0.1600 | | 0.1600 | ||
| 5.17 | | 5.17 | ||
|} | |} | ||
* 388et has a lower absolute error in the 5-limit than any previous equal temperaments, past [[323edo|323]] and followed by [[441edo|441]]. | |||
=== Rank-2 temperaments === | === Rank-2 temperaments === | ||
| Line 75: | Line 81: | ||
|+Table of rank-2 temperaments by generator | |+Table of rank-2 temperaments by generator | ||
! Periods<br>per 8ve | ! Periods<br>per 8ve | ||
! Generator | ! Generator* | ||
! Cents | ! Cents* | ||
! Associated<br>Ratio | ! Associated<br>Ratio* | ||
! Temperaments | ! Temperaments | ||
|- | |- | ||
| Line 128: | Line 134: | ||
| [[Berkelium]] | | [[Berkelium]] | ||
|} | |} | ||
<nowiki>*</nowiki> [[Normal lists|octave-reduced form]], reduced to the first half-octave, and [[Normal lists|minimal form]] in parentheses if it is distinct | |||
[[Category:Cuthbert]] | [[Category:Cuthbert]] | ||