764edo: Difference between revisions
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{{Infobox ET}} | {{Infobox ET}} | ||
{{ | {{ED intro}} | ||
== Theory == | == Theory == | ||
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== Regular temperament properties == | == Regular temperament properties == | ||
{ | {| class="wikitable center-4 center-5 center-6" | ||
|- | |||
! rowspan="2" | [[Subgroup]] | |||
! rowspan="2" | [[Comma list]] | |||
! rowspan="2" | [[Mapping]] | |||
! rowspan="2" | Optimal<br />8ve stretch (¢) | |||
! colspan="2" | Tuning error | |||
|- | |||
! [[TE error|Absolute]] (¢) | |||
! [[TE simple badness|Relative]] (%) | |||
|- | |- | ||
| 2.3 | | 2.3 | ||
| {{monzo| 1211 -764 }} | | {{monzo| 1211 -764 }} | ||
| {{mapping| 764 1211 }} | | {{mapping| 764 1211 }} | ||
| | | −0.0439 | ||
| 0.0439 | | 0.0439 | ||
| 2.80 | | 2.80 | ||
Line 26: | Line 35: | ||
| {{monzo| 38 -2 -15 }}, {{monzo| 25 -48 22 }} | | {{monzo| 38 -2 -15 }}, {{monzo| 25 -48 22 }} | ||
| {{mapping| 764 1211 1774 }} | | {{mapping| 764 1211 1774 }} | ||
| | | −0.0399 | ||
| 0.0363 | | 0.0363 | ||
| 2.31 | | 2.31 | ||
Line 33: | Line 42: | ||
| 4375/4374, 52734375/52706752, {{monzo| 31 -6 -2 -6 }} | | 4375/4374, 52734375/52706752, {{monzo| 31 -6 -2 -6 }} | ||
| {{mapping| 764 1211 1774 2145 }} | | {{mapping| 764 1211 1774 2145 }} | ||
| | | −0.0552 | ||
| 0.0412 | | 0.0412 | ||
| 2.62 | | 2.62 | ||
Line 40: | Line 49: | ||
| 3025/3024, 4375/4374, 131072/130977, 35156250/35153041 | | 3025/3024, 4375/4374, 131072/130977, 35156250/35153041 | ||
| {{mapping| 764 1211 1774 2145 2643 }} | | {{mapping| 764 1211 1774 2145 2643 }} | ||
| | | −0.0436 | ||
| 0.0435 | | 0.0435 | ||
| 2.77 | | 2.77 | ||
Line 47: | Line 56: | ||
| 1716/1715, 2080/2079, 3025/3024, 4096/4095, 10549994/10546875 | | 1716/1715, 2080/2079, 3025/3024, 4096/4095, 10549994/10546875 | ||
| {{mapping| 764 1211 1774 2145 2643 2827 }} | | {{mapping| 764 1211 1774 2145 2643 2827 }} | ||
| | | −0.0267 | ||
| 0.0548 | | 0.0548 | ||
| 3.49 | | 3.49 | ||
Line 54: | Line 63: | ||
| 1716/1715, 2080/2079, 2431/2430, 2500/2499, 4096/4095, 4914/4913 | | 1716/1715, 2080/2079, 2431/2430, 2500/2499, 4096/4095, 4914/4913 | ||
| {{mapping| 764 1211 1774 2145 2643 2827 3123 }} | | {{mapping| 764 1211 1774 2145 2643 2827 3123 }} | ||
| | | −0.0327 | ||
| 0.0528 | | 0.0528 | ||
| 3.36 | | 3.36 | ||
Line 61: | Line 70: | ||
| 1716/1715, 2080/2079, 2024/2023, 2431/2430, 2500/2499, 3520/3519, 4096/4095 | | 1716/1715, 2080/2079, 2024/2023, 2431/2430, 2500/2499, 3520/3519, 4096/4095 | ||
| {{mapping| 764 1211 1774 2145 2643 2827 3123 3456 }} | | {{mapping| 764 1211 1774 2145 2643 2827 3123 3456 }} | ||
| | | −0.0286 | ||
| 0.0506 | | 0.0506 | ||
| 3.22 | | 3.22 | ||
|} | |||
* 764et has lower absolute errors than any previous equal temperaments in the 13- and 17-limit. In the 13-limit it beats [[684edo|684]] and is only bettered by [[935edo|935]]. In the 17-limit it beats [[742edo|742]] and is only bettered by [[814edo|814]]. | * 764et has lower absolute errors than any previous equal temperaments in the 13- and 17-limit. In the 13-limit it beats [[684edo|684]] and is only bettered by [[935edo|935]]. In the 17-limit it beats [[742edo|742]] and is only bettered by [[814edo|814]]. | ||
* It is best at the no-19 23-limit, where it has a lower relative error than any previous equal temperaments, past [[494edo|494]] and before [[1578edo|1578]]. | * It is best at the no-19 23-limit, where it has a lower relative error than any previous equal temperaments, past [[494edo|494]] and before [[1578edo|1578]]. | ||
=== Rank-2 temperaments === | === Rank-2 temperaments === | ||
{ | {| class="wikitable center-all left-5" | ||
|+ style="font-size: 105%;" | Table of rank-2 temperaments by generator | |||
|- | |||
! Periods<br />per 8ve | |||
! Generator* | |||
! Cents* | |||
! Associated<br />ratio* | |||
! Temperaments | |||
|- | |- | ||
| 1 | | 1 | ||
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| 9/7<br />(11/10) | | 9/7<br />(11/10) | ||
| [[Semisupermajor]] | | [[Semisupermajor]] | ||
|} | |||
<nowiki />* [[Normal lists|Octave-reduced form]], reduced to the first half-octave, and [[Normal lists|minimal form]] in parentheses if distinct | |||
[[Category:Abigail]] | [[Category:Abigail]] |