Schismic–commatic equivalence continuum: Difference between revisions
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The '''Schismic-Pythagorean equivalence continuum''' is a continuum of 5-limit temperaments which equate a number of [[32805/32768|schismas (32805/32768)]] with [[Pythagorean comma|Pythagorean comma ({{monzo|-19 12}})]]. This continuum is theoretically interesting in that these are all 5-limit temperaments supported by [[12edo]]. | The '''Schismic-Pythagorean equivalence continuum''' is a continuum of 5-limit temperaments which equate a number of [[32805/32768|schismas (32805/32768)]] with [[Pythagorean comma|Pythagorean comma ({{monzo| -19 12 }})]]. This continuum is theoretically interesting in that these are all 5-limit temperaments supported by [[12edo]]. | ||
All temperaments in the continuum satisfy (32805/32768)<sup>''n''</sup> ~ {{monzo|-19 12}}. Varying ''n'' results in different temperaments listed in the table below. It converges to [[schismic]] as ''n'' approaches infinity. If we allow non-integer and infinite ''n'', the continuum describes the set of all [[5-limit]] temperaments supported by [[12edo]] | All temperaments in the continuum satisfy (32805/32768)<sup>''n''</sup> ~ {{monzo|-19 12}}. Varying ''n'' results in different temperaments listed in the table below. It converges to [[schismic]] as ''n'' approaches infinity. If we allow non-integer and infinite ''n'', the continuum describes the set of all [[5-limit]] temperaments supported by [[12edo]] due to it being the unique equal temperament that tempers both commas and thus tempers all combinations of them. The just value of ''n'' is approximately 12.0078623975…, and temperaments having ''n'' near this value tend to be the most accurate ones – indeed, the fact that this number is so close to 12 reflects how small [[Kirnberger's atom]] (the difference between 12 schismas and the Pythagorean comma) is. | ||
{| class="wikitable center-1 center-2" | {| class="wikitable center-1 center-2" | ||
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|- | |- | ||
| 4 | | 4 | ||
| [[ | | [[Undim family|Undim]] | ||
| | | | ||
| {{monzo| 41 -20 -4 }} | | {{monzo| 41 -20 -4 }} | ||
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POTE generator: ~4/3 = 500.970 | POTE generator: ~4/3 = 500.970 | ||
Vals: {{Val list| 12, 79, 91, 103 }} | Vals: {{Val list| 12, …, 79, 91, 103 }} | ||
Badness: 0.295079 | Badness: 0.295079 | ||
| Line 152: | Line 152: | ||
POTE generator: ~135/128 = 99.267 | POTE generator: ~135/128 = 99.267 | ||
Vals: {{Val list| 12, 109, 121, 133 }} | Vals: {{Val list| 12, …, 85, 97, 109, 121, 133, 278c, 411bc, 544bc }} | ||
Badness: 0.444506 | Badness: 0.444506 | ||
== Undim (12&152) == | == Undim (12&152) == | ||
{{ | {{See also| Undim family }} | ||
Subgroup: 2.3.5 | Subgroup: 2.3.5 | ||
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POTE generator: ~3/2 = 702.6054 | POTE generator: ~3/2 = 702.6054 | ||
Vals: {{Val list| 12, 140, 152, | Vals: {{Val list| 12, …, 104, 116, 128, 140, 152, 610, 772, 924c, 1076bc, 1228bc }} | ||
Badness: 0.241703 | Badness: 0.241703 | ||
| Line 186: | Line 186: | ||
{{Multival|legend=1| 5 -28 -56 }} | {{Multival|legend=1| 5 -28 -56 }} | ||
Vals: {{Val list| 12, 193, 205, 217, 422 }} | Vals: {{Val list| 12, …, 181, 193, 205, 217, 422 }} | ||
Badness: 0.399849 | Badness: 0.399849 | ||
| Line 203: | Line 203: | ||
{{Multival|legend=1| 6 -36 -77 }} | {{Multival|legend=1| 6 -36 -77 }} | ||
Vals: {{Val list| 12, 258, 270, 1878 }} | Vals: {{Val list| 12, …, 222, 234, 246, 258, 270, 1068, 1338, 1608, 1878, 4026bc }} | ||
Badness: 0.555423 | Badness: 0.555423 | ||