289edo: Difference between revisions
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{{Infobox ET}} | {{Infobox ET}} | ||
{{ | {{ED intro}} | ||
== Theory == | == Theory == | ||
289edo | 289edo is a strong 5-limit system with decent [[11-limit|11-]] and [[13-limit]] interpretations despite in[[consistency]] in the [[13-odd-limit]]. As an equal temperament, it [[tempering out|tempers out]] the [[schisma]], 32805/32768 in the [[5-limit]]; [[4375/4374]] and [[65625/65536]] in the [[7-limit]]; [[441/440]] and [[4000/3993]] in the 11-limit; and [[364/363]], [[676/675]], [[1001/1000]], [[1575/1573]] and [[2080/2079]] in the 13-limit. | ||
It is the [[optimal patent val]] for the [[13-limit]] rank-5 temperament tempering out 364/363, and the 13-limit [[ | It is the [[optimal patent val]] for the [[13-limit]] rank-5 temperament tempering out 364/363, and the 13-limit [[history (temperament)|history]] temperament, which tempers out 364/363, 441/440 and 676/675. It provides a good tuning for the 11-limit version also. It is also the optimal patent val for [[sextilifourths]], [[quintaschis]], and [[quincy]] in both the 11- and 13-limit. | ||
=== Prime harmonics === | === Prime harmonics === | ||
{{Harmonics in equal|289}} | {{Harmonics in equal|289}} | ||
=== | === Subsets and supersets === | ||
289 is 17 squared. In light of containing [[17edo]] as a subset, 289edo [[support]]s the [[chlorine]] temperament, which tempers out the [[septendecima]] {{monzo|-52 -17 34}} and the ragisma 4375/4374. | 289 is 17 squared. In light of containing [[17edo]] as a subset, 289edo [[support]]s the [[chlorine]] temperament, which tempers out the [[septendecima]] {{monzo| -52 -17 34 }} and the ragisma 4375/4374. | ||
== 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 26: | Line 27: | ||
| 2.3 | | 2.3 | ||
| {{monzo| -458 289 }} | | {{monzo| -458 289 }} | ||
| | | {{mapping| 289 458 }} | ||
| +0.0709 | | +0.0709 | ||
| 0.0710 | | 0.0710 | ||
Line 33: | Line 34: | ||
| 2.3.5 | | 2.3.5 | ||
| 32805/32768, {{monzo| 7 41 -31 }} | | 32805/32768, {{monzo| 7 41 -31 }} | ||
| | | {{mapping| 289 458 671 }} | ||
| +0.0695 | | +0.0695 | ||
| 0.0580 | | 0.0580 | ||
Line 40: | Line 41: | ||
| 2.3.5.7 | | 2.3.5.7 | ||
| 4375/4374, 32805/32768, 235298/234375 | | 4375/4374, 32805/32768, 235298/234375 | ||
| | | {{mapping| 289 458 671 811 }} | ||
| +0.1725 | | +0.1725 | ||
| 0.1854 | | 0.1854 | ||
Line 47: | Line 48: | ||
| 2.3.5.7.11 | | 2.3.5.7.11 | ||
| 441/440, 4000/3993, 4375/4374, 32805/32768 | | 441/440, 4000/3993, 4375/4374, 32805/32768 | ||
| | | {{mapping| 289 458 671 811 1000 }} | ||
| +0.0841 | | +0.0841 | ||
| 0.2423 | | 0.2423 | ||
Line 54: | Line 55: | ||
| 2.3.5.7.11.13 | | 2.3.5.7.11.13 | ||
| 364/363, 441/440, 676/675, 4375/4374, 19773/19712 | | 364/363, 441/440, 676/675, 4375/4374, 19773/19712 | ||
| | | {{mapping| 289 458 671 811 1000 1069 }} | ||
| +0.1500 | | +0.1500 | ||
| 0.2657 | | 0.2657 | ||
| 6.40 | | 6.40 | ||
|} | |} | ||
* 289et has a lower absolute error in the 5-limit than any previous equal temperaments, past [[171edo|171]] and followed by [[323edo|323]]. | |||
=== Rank-2 temperaments === | === Rank-2 temperaments === | ||
{| class="wikitable center-all left-5" | {| class="wikitable center-all left-5" | ||
! Periods<br>per 8ve | |+ style="font-size: 105%;" | Table of rank-2 temperaments by generator | ||
! Generator | |- | ||
! Cents | ! Periods<br />per 8ve | ||
! Associated<br> | ! Generator* | ||
! Cents* | |||
! Associated<br />ratio* | |||
! Temperaments | ! Temperaments | ||
|- | |- | ||
Line 84: | Line 88: | ||
| 83.04 | | 83.04 | ||
| 21/20 | | 21/20 | ||
| [[ | | [[Sextilifourths]] | ||
|- | |- | ||
| 1 | | 1 | ||
Line 123: | Line 127: | ||
|- | |- | ||
| 17 | | 17 | ||
| 93\289<br>(8\289) | | 93\289<br />(8\289) | ||
| 386.16<br>(33.22) | | 386.16<br />(33.22) | ||
| {{monzo| -23 5 9 -2 }}<br>(100352/98415) | | {{monzo| -23 5 9 -2 }}<br />(100352/98415) | ||
| [[Chlorine]] | | [[Chlorine]] | ||
|} | |} | ||
<nowiki />* [[Normal lists|Octave-reduced form]], reduced to the first half-octave, and [[Normal lists|minimal form]] in parentheses if distinct | |||
[[Category:History (temperament)]] | |||
[[Category:Minor minthmic]] | [[Category:Minor minthmic]] | ||
[[Category: | [[Category:Quincy]] | ||
[[Category:Quintaschis]] | [[Category:Quintaschis]] | ||
[[Category:Sextilifourths]] |