183edo: Difference between revisions
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== Theory == | == Theory == | ||
183edo is notable as a higher limit system, especially when 7 is left out of the picture. | 183edo is notable as a higher limit system, especially when 7 is left out of the picture. The equal temperament [[tempering out|tempers out]] the [[schisma]] in the [[5-limit]]. In the [[7-limit]], it tempers out porwell, [[6144/6125]], cataharry, [[19683/19600]] and mirkwai, [[16875/16807]]. In the [[11-limit]], it tempers out [[540/539]], 1375/1372, [[3025/3024]], [[5632/5625]], and [[8019/8000]]; in the [[13-limit]], [[351/350]], [[676/675]], [[729/728]], [[1001/1000]], [[1573/1568]], [[2080/2079]], [[4096/4095]], [[4225/4224]], and [[6656/6655]]; in the [[17-limit]] [[442/441]], [[561/560]], [[715/714]], [[936/935]], [[1089/1088]], and [[1156/1155]]; and in the [[19-limit]] [[456/455]]. It is the [[optimal patent val]] for 13- and 17-limit [[mirkat]], the 72 & 111 temperament, and an excellent tuning for the [[rank-3 temperament]]s [[madagascar]] and [[borneo]]. It allows [[essentially tempered chord]] including [[ratwolfsmic chords]], [[swetismic chords]], [[squbemic chords]], [[sinbadmic chords]], and [[lambeth chords]] in the 13-odd-limit, in addition to [[island chords]] in the 15-odd-limit. | ||
As a no-sevens temperament, it tempers out 5632/5625, 8019/8000, 676/675, 4225/4224, 6656/6655, 936/935, 1089/1088, and 1377/1375. | As a no-sevens temperament, it tempers out 5632/5625, 8019/8000, 676/675, 4225/4224, 6656/6655, 936/935, 1089/1088, and 1377/1375. | ||
=== Prime harmonics === | === Prime harmonics === | ||
In the range of | In the range of edos from 100 to 200, 183edo is notable as having especially low error in ''all'' [[prime limit]]s from 11 to 29, compared using a variety of metrics (prime error punishments), although it has a bad 19 which causes it to fail to be consistent in the [[19-odd-limit]]. It is however a strong no-19's system, being consistent in the no-19's no-35's 29-prime-limited 45-odd-limit add-43. (The prime 43 is added in the set of odd harmonics due to its essentially perfect accuracy. The harmonic 35 is excluded due to the sharpness of 7 compounding and causing inconsistency in ''some'' cases such as for 39/35.) It can also be considered to model the 2.17.29.43 subgroup with extreme accuracy. | ||
{{Harmonics in equal|183}} | {{Harmonics in equal|183}} | ||
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== 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|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 25: | Line 25: | ||
| 2.3 | | 2.3 | ||
| {{monzo| -290 183 }} | | {{monzo| -290 183 }} | ||
| | | {{mapping| 183 290 }} | ||
| +0.0996 | | +0.0996 | ||
| 0.100 | | 0.100 | ||
| Line 32: | Line 32: | ||
| 2.3.5 | | 2.3.5 | ||
| 32805/32768, {{val| 10 23 -20 }} | | 32805/32768, {{val| 10 23 -20 }} | ||
| | | {{mapping| 183 290 425 }} | ||
| -0.0157 | | -0.0157 | ||
| 0.182 | | 0.182 | ||
| Line 39: | Line 39: | ||
| 2.3.5.7 | | 2.3.5.7 | ||
| 6144/6125, 16875/16807, 19683/19600 | | 6144/6125, 16875/16807, 19683/19600 | ||
| | | {{mapping| 183 290 425 514 }} | ||
| -0.1601 | | -0.1601 | ||
| 0.296 | | 0.296 | ||
| Line 46: | Line 46: | ||
| 2.3.5.7.11 | | 2.3.5.7.11 | ||
| 540/539, 1375/1372, 5632/5625, 8019/8000 | | 540/539, 1375/1372, 5632/5625, 8019/8000 | ||
| | | {{mapping| 183 290 425 514 633 }} | ||
| -0.0993 | | -0.0993 | ||
| 0.291 | | 0.291 | ||
| Line 53: | Line 53: | ||
| 2.3.5.7.11.13 | | 2.3.5.7.11.13 | ||
| 351/350, 540/539, 676/675, 1375/1372, 4096/4095 | | 351/350, 540/539, 676/675, 1375/1372, 4096/4095 | ||
| | | {{mapping| 183 290 425 514 633 677 }} | ||
| -0.0295 | | -0.0295 | ||
| 0.308 | | 0.308 | ||
| Line 60: | Line 60: | ||
| 2.3.5.7.11.13.17 | | 2.3.5.7.11.13.17 | ||
| 351/350, 442/441, 540/539, 561/560, 1375/1372, 4096/4095 | | 351/350, 442/441, 540/539, 561/560, 1375/1372, 4096/4095 | ||
| | | {{mapping| 183 290 425 514 633 677 748 }} | ||
| -0.0240 | | -0.0240 | ||
| 0.286 | | 0.286 | ||
| Line 70: | Line 70: | ||
|+Table of rank-2 temperaments by generator | |+Table of rank-2 temperaments by generator | ||
! Periods<br>per 8ve | ! Periods<br>per 8ve | ||
! Generator | ! Generator* | ||
! Cents | ! Cents* | ||
! Associated<br> | ! Associated<br>Ratio* | ||
! Temperament | ! Temperament | ||
|- | |- | ||
| Line 153: | Line 153: | ||
| [[Promethium]] | | [[Promethium]] | ||
|} | |} | ||
<nowiki>*</nowiki> [[Normal lists|octave-reduced form]], reduced to the first half-octave, and [[Normal lists|minimal form]] in parentheses if it is distinct | |||
== Music == | == Music == | ||