Breedsmic temperaments: Difference between revisions
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= Tertiaseptal = | = Tertiaseptal = | ||
Aside from the breedsma, | {{main|Tertiaseptal}} | ||
Aside from the breedsma, tertiaseptal tempers out 65625/65536, the horwell comma, 703125/702464, the meter, and 2100875/2097152, the rainy comma. It can be described as the 31&171 temperament, and 256/245, 1029/1024 less than 21/20, serves as its generator. Three of these fall short of 8/7 by 2100875/2097152, and the generator can be taken as 1/3 of an 8/7 flattened by a fraction of a cent. [[171edo]] makes for an excellent tuning. The 15 or 16 note MOS can be used to explore no-threes harmony, and the 31 note MOS gives plenty of room for those as well. | |||
Subgroup: 2.3.5.7 | Subgroup: 2.3.5.7 | ||
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POTE generator: ~22/21 = 77.162 | POTE generator: ~22/21 = 77.162 | ||
Vals: {{Val list| 31, 109g, 140 | Vals: {{Val list| 31, 109g, 140, 311e, 451ee }} | ||
Badness: 0.022416 | Badness: 0.022416 | ||
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Badness: 0.015633 | Badness: 0.015633 | ||
=== 13-limit === | |||
Subgroup: 2.3.5.7.11.13 | |||
Comma list: 625/624, 1575/1573, 2401/2400, 4096/4095 | |||
Mapping: [{{val| 1 3 2 3 6 1 }}, {{val| 0 -44 10 -6 -79 84 }}] | |||
POTE generator: ~45/44 = 38.588 | |||
Vals: {{Val list| 31, 280, 311, 964f, 1275f, 1586cff }} | |||
Badness: 0.033573 | |||
=== 17-limit === | |||
Subgroup: 2.3.5.7.11.13.17 | |||
Comma list: 625/624, 833/832, 1225/1224, 1575/1573, 4096/4095 | |||
Mapping: [{{val| 1 3 2 3 6 1 1 }}, {{val| 0 -44 10 -6 -79 84 96 }}] | |||
POTE generator: ~45/44 = 38.589 | |||
Vals: {{Val list| 31, 280, 311, 653f, 964f }} | |||
Badness: 0.025298 | |||
= Harry = | = Harry = | ||
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Harry becomes much more interesting as we move to the 11-limit, where we can add 243/242, 441/440 and 540/539 to the set of commas. 130 and especially 202 still make for good tuning choices, and the octave part of the wedgie is <<12 34 20 30 ...||. | Harry becomes much more interesting as we move to the 11-limit, where we can add 243/242, 441/440 and 540/539 to the set of commas. 130 and especially 202 still make for good tuning choices, and the octave part of the wedgie is <<12 34 20 30 ...||. | ||
Similar comments apply to the 13-limit, where we can add 351/350 and 364/363 to the commas, with <<12 34 20 30 52 ...|| as the octave wedgie. [[130edo]] is again a good tuning choice, but even better might be tuning 7s justly, which can be done via a generator of 83.1174 cents. 72 notes of harry gives plenty of room even for the 13-limit harmonies. | Similar comments apply to the 13-limit, where we can add 351/350 and 364/363 to the commas, with <<12 34 20 30 52 ...|| as the octave wedgie. [[130edo|130EDO]] is again a good tuning choice, but even better might be tuning 7s justly, which can be done via a generator of 83.1174 cents. 72 notes of harry gives plenty of room even for the 13-limit harmonies. | ||
Subgroup: 2.3.5.7 | |||
[[Comma list]]: 2401/2400, 19683/19600 | |||
[[Mapping]]: [{{val| 2 4 7 7 }}, {{val| 0 -6 -17 -10 }}] | |||
{{Multival|legend=1| 12 34 20 26 -2 -49 }} | |||
[[POTE generator]]: ~21/20 = 83.156 | [[POTE generator]]: ~21/20 = 83.156 | ||
{{Val list|legend=1| 14c, 58, 72, 130, 202, 534, 736b, 938b }} | |||
[[Badness]]: 0.034077 | |||
== 11-limit == | |||
Subgroup: 2.3.5.7.11 | |||
Comma list: 243/242, 441/440, 4000/3993 | |||
Mapping: [{{val| 2 4 7 7 9 }}, {{val| 0 -6 -17 -10 -15 }}] | |||
POTE generator: ~21/20 = 83.167 | |||
Vals: {{Val list| 14c, 58, 72, 130, 202 }} | |||
Badness: 0.015867 | |||
== 13-limit == | |||
Subgroup: 2.3.5.7.11.13 | |||
Comma list: 243/242, 351/350, 441/440, 676/675 | |||
Mapping: [{{val| 2 4 7 7 9 11 }}, {{val| 0 -6 -17 -10 -15 -26 }}] | |||
POTE generator: ~21/20 = 83.116 | POTE generator: ~21/20 = 83.116 | ||
Vals: {{Val list| 58, 72, 130, 332f, 462ef }} | |||
Badness: 0.013046 | |||
== 17-limit == | |||
Subgroup: 2.3.5.7.11.13.17 | |||
Comma list: 221/220, 243/242, 289/288, 351/350, 441/440 | |||
Mapping: [{{val| 2 4 7 7 9 11 9 }}, {{val| 0 -6 -17 -10 -15 -26 -6 }}] | |||
POTE generator: ~21/20 = 83.168 | POTE generator: ~21/20 = 83.168 | ||
Vals: {{Val list| 58, 72, 130, 202g }} | |||
Badness: 0. | Badness: 0.012657 | ||
=Quasiorwell= | = Quasiorwell = | ||
In addition to 2401/2400, quasiorwell tempers out 29360128/29296875 = |22 -1 -10 1>. It has a wedgie <<38 -3 8 -93 -94 27||. It has a generator 1024/875, which is 6144/6125 more than 7/6. It may be described as the 31&270 temperament, and as one might expect, 61\270 makes for an excellent tuning choice. Other possibilities are (7/2)^(1/8), giving just 7s, or 384^(1/38), giving pure fifths. | In addition to 2401/2400, quasiorwell tempers out 29360128/29296875 = |22 -1 -10 1>. It has a wedgie <<38 -3 8 -93 -94 27||. It has a generator 1024/875, which is 6144/6125 more than 7/6. It may be described as the 31&270 temperament, and as one might expect, 61\270 makes for an excellent tuning choice. Other possibilities are (7/2)^(1/8), giving just 7s, or 384^(1/38), giving pure fifths. | ||