764edo: Difference between revisions

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{{Infobox ET}}
{{Infobox ET}}
{{EDO intro|764}}
{{ED intro}}


== Theory ==
== Theory ==
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== Regular temperament properties ==
== Regular temperament properties ==
{{comma basis begin}}
{| 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 }}
| &minus;0.0439
| −0.0439
| 0.0439
| 0.0439
| 2.80
| 2.80
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| {{monzo| 38 -2 -15 }}, {{monzo| 25 -48 22 }}
| {{monzo| 38 -2 -15 }}, {{monzo| 25 -48 22 }}
| {{mapping| 764 1211 1774 }}
| {{mapping| 764 1211 1774 }}
| &minus;0.0399
| −0.0399
| 0.0363
| 0.0363
| 2.31
| 2.31
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| 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 }}
| &minus;0.0552
| −0.0552
| 0.0412
| 0.0412
| 2.62
| 2.62
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| 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 }}
| &minus;0.0436
| −0.0436
| 0.0435
| 0.0435
| 2.77
| 2.77
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| 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 }}
| &minus;0.0267
| −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 }}
| &minus;0.0327
| −0.0327
| 0.0528
| 0.0528
| 3.36
| 3.36
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| 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 }}
| &minus;0.0286
| −0.0286
| 0.0506
| 0.0506
| 3.22
| 3.22
{{comma basis end}}
|}
* 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 ===
{{rank-2 begin}}
{| 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]]
{{rank-2 end}}
|}
{{orf}}
<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]]