487edo: Difference between revisions
+RTT table and rank-2 temperaments |
ArrowHead294 (talk | contribs) mNo edit summary |
||
(8 intermediate revisions by 3 users not shown) | |||
Line 1: | Line 1: | ||
{{Infobox ET}} | {{Infobox ET}} | ||
{{ | {{ED intro}} | ||
== Theory == | == Theory == | ||
487edo is [[consistency|distinctly consistent]] to the [[13-odd-limit]]. As an equal temperament, it [[tempering out|tempers out]] {{monzo| 24 -21 4 }} ([[vulture comma]]) and {{monzo| 55 -1 -23 }} (counterwürschmidt comma) in the 5-limit, 4375/4374 ([[ragisma]]), 235298/234375 ([[triwellisma]]), and 33554432/33480783 ([[garischisma]]) in the 7-limit, [[5632/5625]], [[12005/11979]], [[19712/19683]], [[41503/41472]] in the 11-limit, [[676/675]], [[1001/1000]], [[2080/2079]], [[4096/4095]], and [[4225/4224]] in the 13-limit. It supports [[semidimfourth]], [[seniority]], and [[vulture]]. | |||
=== Prime harmonics === | === Prime harmonics === | ||
{{Harmonics in equal|487 | {{Harmonics in equal|487}} | ||
=== | === Subsets and supersets === | ||
487edo is the 93rd [[prime edo]]. | 487edo is the 93rd [[prime edo]]. | ||
== Regular temperament properties == | == Regular temperament properties == | ||
{| class="wikitable center-4 center-5 center-6" | {| class="wikitable center-4 center-5 center-6" | ||
|- | |||
! rowspan="2" | [[Subgroup]] | ! rowspan="2" | [[Subgroup]] | ||
! rowspan="2" | [[Comma list | ! rowspan="2" | [[Comma list]] | ||
! rowspan="2" | [[Mapping]] | ! rowspan="2" | [[Mapping]] | ||
! rowspan="2" | Optimal<br>8ve | ! rowspan="2" | Optimal<br />8ve stretch (¢) | ||
! colspan="2" | Tuning | ! colspan="2" | Tuning error | ||
|- | |- | ||
! [[TE error|Absolute]] (¢) | ! [[TE error|Absolute]] (¢) | ||
Line 24: | Line 25: | ||
| 2.3 | | 2.3 | ||
| {{monzo| 772 -487 }} | | {{monzo| 772 -487 }} | ||
| | | {{mapping| 487 772 }} | ||
| | | −0.0958 | ||
| 0.0958 | | 0.0958 | ||
| 3.89 | | 3.89 | ||
Line 31: | Line 32: | ||
| 2.3.5 | | 2.3.5 | ||
| {{monzo| 24 -21 4 }}, {{monzo| 55 -1 -23 }} | | {{monzo| 24 -21 4 }}, {{monzo| 55 -1 -23 }} | ||
| | | {{mapping| 487 772 1131 }} | ||
| | | −0.1421 | ||
| 0.1020 | | 0.1020 | ||
| 4.14 | | 4.14 | ||
Line 38: | Line 39: | ||
| 2.3.5.7 | | 2.3.5.7 | ||
| 4375/4374, 235298/234375, 33554432/33480783 | | 4375/4374, 235298/234375, 33554432/33480783 | ||
| | | {{mapping| 487 772 1131 1367 }} | ||
| | | −0.0667 | ||
| 0.1577 | | 0.1577 | ||
| 6.40 | | 6.40 | ||
Line 45: | Line 46: | ||
| 2.3.5.7.11 | | 2.3.5.7.11 | ||
| 4375/4374, 5632/5625, 12005/11979, 41503/41472 | | 4375/4374, 5632/5625, 12005/11979, 41503/41472 | ||
| | | {{mapping| 487 772 1131 1367 1685 }} | ||
| | | −0.0899 | ||
| 0.1485 | | 0.1485 | ||
| 6.03 | | 6.03 | ||
Line 52: | Line 53: | ||
| 2.3.5.7.11.13 | | 2.3.5.7.11.13 | ||
| 676/675, 1001/1000, 4096/4095, 4375/4374, 12005/11979 | | 676/675, 1001/1000, 4096/4095, 4375/4374, 12005/11979 | ||
| | | {{mapping| 487 772 1131 1367 1685 1802 }} | ||
| | | −0.0623 | ||
| 0.1490 | | 0.1490 | ||
| 6.05 | | 6.05 | ||
Line 60: | Line 61: | ||
=== Rank-2 temperaments === | === Rank-2 temperaments === | ||
{| class="wikitable center-all left-5" | {| class="wikitable center-all left-5" | ||
|+Table of rank-2 temperaments by generator | |+ style="font-size: 105%;" | Table of rank-2 temperaments by generator | ||
! Periods<br>per 8ve | |- | ||
! Generator | ! Periods<br />per 8ve | ||
! Cents | ! Generator* | ||
! Associated<br> | ! Cents* | ||
! Associated<br />ratio* | |||
! Temperaments | ! Temperaments | ||
|- | |- | ||
Line 72: | Line 74: | ||
| 3087/2560 | | 3087/2560 | ||
| [[Seniority]] | | [[Seniority]] | ||
|- | |||
| 1 | |||
| 157\487 | |||
| 386.86 | |||
| 5/4 | |||
| [[Counterwürschmidt]] | |||
|- | |- | ||
| 1 | | 1 | ||
Line 97: | Line 105: | ||
| [[Tritriple]] (5-limit) | | [[Tritriple]] (5-limit) | ||
|} | |} | ||
<nowiki />* [[Normal lists|Octave-reduced form]], reduced to the first half-octave, and [[Normal lists|minimal form]] in parentheses if distinct | |||
== Scales == | == Scales == | ||
Line 103: | Line 112: | ||
* [[Silver17]] | * [[Silver17]] | ||
[[Category:Silver]] | [[Category:Silver]] |