388edo: Difference between revisions

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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 distinctly [[consistent]] through to the [[27-odd-limit]]; it is also consistent through the 37-odd-limit.
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]].


388et 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, and provides a tuning with less error than any previous equal temperaments. 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 is the [[optimal patent val]] for the rank-5 cuthbert temperament, which tempers out cuthbert, the [[847/845]] 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]].
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 }}
| [{{val| 388 615 }}]
| {{mapping| 388 615 }}
| +0.0337
| +0.0337
| 0.0337
| 0.0337
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| 2.3.5
| 2.3.5
| {{monzo| 23 6 -14 }}, {{monzo| 39 -29 3 }}
| {{monzo| 23 6 -14 }}, {{monzo| 39 -29 3 }}
| [{{val| 388 615 901 }}]
| {{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
| [{{val| 388 615 901 1089 }}]
| {{mapping| 388 615 901 1089 }}
| +0.0224
| +0.0224
| 0.1546
| 0.1546
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| 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
| [{{val| 388 615 901 1089 1342 }}]
| {{mapping| 388 615 901 1089 1342 }}
| +0.0643
| +0.0643
| 0.1617
| 0.1617
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| 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
| [{{val| 388 615 901 1089 1342 1436 }}]
| {{mapping| 388 615 901 1089 1342 1436 }}
| +0.0216
| +0.0216
| 0.1758
| 0.1758
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| 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
| [{{val| 388 615 901 1089 1342 1436 1586 }}]
| {{mapping| 388 615 901 1089 1342 1436 1586 }}
| +0.0116
| +0.0116
| 0.1646
| 0.1646
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| 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
| [{{val| 388 615 901 1089 1342 1436 1586 1648 }}]
| {{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 ===
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|+Table of rank-2 temperaments by generator
|+Table of rank-2 temperaments by generator
! Periods<br>per 8ve
! Periods<br>per 8ve
! Generator<br>(Reduced)
! Generator*
! Cents<br>(Reduced)
! Cents*
! Associated<br>Ratio
! Associated<br>Ratio*
! Temperaments
! Temperaments
|-
|-
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| [[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]]