Semicomma family: Difference between revisions
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The 5-limit parent comma for the '''semicomma family''' is the [[semicomma]], 2109375/2097152 = {{monzo| -21 3 7 }}. This is the amount by which three pure 3/1 twelfths exceed seven pure 8/5 minor sixths. | The 5-limit parent comma for the '''semicomma family''' is the [[semicomma]], 2109375/2097152 = {{monzo| -21 3 7 }}. This is the amount by which three pure 3/1 twelfths exceed seven pure 8/5 minor sixths. | ||
== Orson | == Orson == | ||
'''Orson''', first discovered by [[Erv Wilson]], is the [[5-limit]] temperament tempering out the semicomma. It has a [[generator]] of [[75/64]], which is sharper than [[7/6]] by [[225/224]] when untempered, and less sharp than that in any good orson tempering, for example [[53edo]] or [[84edo]]. These give tunings to the generator which are sharp of 7/6 by less than five [[cent]]s, making it hard to treat orson as anything other than an (at least) 7-limit system, leading to orwell. | '''Orson''', first discovered by [[Erv Wilson]], is the [[5-limit]] temperament tempering out the semicomma. It has a [[generator]] of [[75/64]], which is sharper than [[7/6]] by [[225/224]] when untempered, and less sharp than that in any good orson tempering, for example [[53edo|53EDO]] or [[84edo|84EDO]]. These give tunings to the generator which are sharp of 7/6 by less than five [[cent]]s, making it hard to treat orson as anything other than an (at least) 7-limit system, leading to orwell. | ||
Subgroup: 2.3.5 | Subgroup: 2.3.5 | ||
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[[Comma list]]: 2109375/2097152 | [[Comma list]]: 2109375/2097152 | ||
[[Mapping]]: [{{val| 1 0 3}}, {{val| 0 7 -3}}] | [[Mapping]]: [{{val| 1 0 3 }}, {{val| 0 7 -3 }}] | ||
[[POTE generator]]: ~75/64 = 271.627 | [[POTE generator]]: ~75/64 = 271.627 | ||
[[Tuning ranges]]: | [[Tuning ranges]]: | ||
* [[ | * [[Diamond monotone]] range: [257.143, 276.923] (3\14 to 3\13) | ||
* [[ | * [[Diamond tradeoff]] range: [271.229, 271.708] | ||
* | * Diamond monotone and tradeoff: [271.229, 271.708] | ||
{{Val list|legend=1| 22, 31, 53, 190, 243, 296, 645c }} | {{Val list|legend=1| 22, 31, 53, 190, 243, 296, 645c }} | ||
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[[Badness]]: 0.040807 | [[Badness]]: 0.040807 | ||
=== Seven limit children | === Seven limit children === | ||
The second comma of the [[Normal lists #Normal interval list|normal comma list]] defines which 7-limit family member we are looking at. Adding 65625/65536 (or 225/224) leads to orwell, but we could also add | The second comma of the [[Normal lists #Normal interval list|normal comma list]] defines which 7-limit family member we are looking at. Adding 65625/65536 (or 225/224) leads to orwell, but we could also add | ||
* 1029/1024, leading to the 31&159 temperament (triwell) with wedgie {{multival| 21 -9 -7 -63 -70 9 }}, or | * 1029/1024, leading to the 31&159 temperament (triwell) with wedgie {{multival| 21 -9 -7 -63 -70 9 }}, or | ||
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* 4375/4374, giving the 53&243 temperament (sabric) with wedgie {{multival| 7 -3 61 -21 77 150 }}. | * 4375/4374, giving the 53&243 temperament (sabric) with wedgie {{multival| 7 -3 61 -21 77 150 }}. | ||
== Orwell | == Orwell == | ||
{{main| Orwell }} | {{main| Orwell }} | ||
So called because 19\84 (as a [[fraction of the octave]]) is a possible generator of this temperament, orwell divides the interval of a twelfth (a tempered 3/1 frequency ratio) into 7 equal steps. It's compatible with [[22edo|22]], [[31edo|31]], [[53edo|53]] and [[84edo|84]] equal, and may be described as the 22&31 temperament, or {{multival| 7 -3 8 -21 -7 27 }}. It's a good system in the [[7-limit]] and naturally extends into the [[11-limit]]. [[84edo]], with the 19\84 generator, provides a good tuning for the 5, 7 and 11 limits, but it does use its second-best 11. However, the 19\84 generator is remarkably close to the 11-limit [[POTE tuning]], as the generator is only 0.0024 cents sharper, and it is a good approximation to the 7-limit POTE generator also; hence 84 may be considered the most recommendable tuning in the 7-limit. [[53edo]] might be preferred in the 5-limit because of its nearly pure fifth and in the 11-limit because of it slightly better 11, though most of its 11-limit harmony is actually worse. Aside from the semicomma and 65625/65536, 7-limit orwell tempers out [[2430/2401]], the nuwell comma, [[1728/1715]], the orwellisma, [[225/224]], the septimal kleisma, and [[6144/6125]], the porwell comma. | So called because 19\84 (as a [[fraction of the octave]]) is a possible generator of this temperament, orwell divides the interval of a twelfth (a tempered 3/1 frequency ratio) into 7 equal steps. It's compatible with [[22edo|22]], [[31edo|31]], [[53edo|53]] and [[84edo|84]] equal, and may be described as the 22&31 temperament, or {{multival| 7 -3 8 -21 -7 27 }}. It's a good system in the [[7-limit]] and naturally extends into the [[11-limit]]. [[84edo|84EDO]], with the 19\84 generator, provides a good tuning for the 5, 7 and 11 limits, but it does use its second-best 11. However, the 19\84 generator is remarkably close to the 11-limit [[POTE tuning]], as the generator is only 0.0024 cents sharper, and it is a good approximation to the 7-limit POTE generator also; hence 84 may be considered the most recommendable tuning in the 7-limit. [[53edo|53EDO]] might be preferred in the 5-limit because of its nearly pure fifth and in the 11-limit because of it slightly better 11, though most of its 11-limit harmony is actually worse. Aside from the semicomma and 65625/65536, 7-limit orwell tempers out [[2430/2401]], the nuwell comma, [[1728/1715]], the orwellisma, [[225/224]], the septimal kleisma, and [[6144/6125]], the porwell comma. | ||
The 11-limit version of orwell tempers out 99/98, which means that two of its sharpened 7/6 generators give a flattened 11/8, as well as 121/120, 176/175, 385/384 and 540/539. Despite lowered tuning accuracy, orwell comes into its own in the 11-limit, giving acceptable accuracy and relatively low complexity. Tempering out the orwellisma, 1728/1715, means that orwell interprets three stacked 7/6 generators as an 8/5, and the tempered 1-7/6-11/8-8/5 chord is natural to orwell. | The 11-limit version of orwell tempers out 99/98, which means that two of its sharpened 7/6 generators give a flattened 11/8, as well as 121/120, 176/175, 385/384 and 540/539. Despite lowered tuning accuracy, orwell comes into its own in the 11-limit, giving acceptable accuracy and relatively low complexity. Tempering out the orwellisma, 1728/1715, means that orwell interprets three stacked 7/6 generators as an 8/5, and the tempered 1-7/6-11/8-8/5 chord is natural to orwell. | ||
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[[Minimax tuning]]: | [[Minimax tuning]]: | ||
* [[7-odd-limit]] | * [[7-odd-limit]]: ~7/6 = {{monzo| 2/11 0 -1/11 1/11 }} | ||
: [{{monzo| 1 0 0 0 }}, {{monzo| 14/11 0 -7/11 7/11 }}, {{monzo| 27/11 0 3/11 -3/11 }}, {{monzo| 27/11 0 -8/11 8/11 }}] | : [{{monzo| 1 0 0 0 }}, {{monzo| 14/11 0 -7/11 7/11 }}, {{monzo| 27/11 0 3/11 -3/11 }}, {{monzo| 27/11 0 -8/11 8/11 }}] | ||
: [[Eigenmonzo]]s: 2, 7/5 | : [[Eigenmonzo]]s: 2, 7/5 | ||
* 9-odd-limit | * 9-odd-limit: ~7/6 = {{monzo| 3/17 2/17 -1/17 }} | ||
: [{{monzo| 1 0 0 0 }}, {{monzo| 21/17 14/17 -7/17 0 }}, {{monzo| 42/17 -6/17 3/17 0 }}, {{monzo| 41/17 16/17 -8/17 0 }}] | : [{{monzo| 1 0 0 0 }}, {{monzo| 21/17 14/17 -7/17 0 }}, {{monzo| 42/17 -6/17 3/17 0 }}, {{monzo| 41/17 16/17 -8/17 0 }}] | ||
: [[Eigenmonzo]]s: 2, 10/9 | : [[Eigenmonzo]]s: 2, 10/9 | ||
[[Tuning ranges]]: | [[Tuning ranges]]: | ||
* [[ | * [[Diamond monotone]] range: [266.667, 272.727] (2\9 to 5\22) | ||
* [[ | * [[Diamond tradeoff]] range: [266.871, 271.708] | ||
* | * Diamond monotone and tradeoff: [266.871, 271.708] | ||
[[Algebraic generator]]: Sabra3, the real root of 12''x<sup>3</sup> - 7''x'' - 48. | [[Algebraic generator]]: Sabra3, the real root of 12''x<sup>3</sup> - 7''x'' - 48. | ||
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[[Badness]]: 0.020735 | [[Badness]]: 0.020735 | ||
=== 11-limit | === 11-limit === | ||
Subgroup: 2.3.5.7.11 | Subgroup: 2.3.5.7.11 | ||
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Minimax tuning: | Minimax tuning: | ||
* 11-odd-limit | * 11-odd-limit: ~7/6 = {{monzo| 2/11 0 -1/11 1/11 }} | ||
: [{{monzo| 1 0 0 0 0 }}, {{monzo| 14/11 0 -7/11 7/11 0 }}, {{monzo| 27/11 0 3/11 -3/11 0 }}, {{monzo| 27/11 0 -8/11 8/11 0 }}, {{monzo| 37/11 0 -2/11 2/11 0 }}] | : [{{monzo| 1 0 0 0 0 }}, {{monzo| 14/11 0 -7/11 7/11 0 }}, {{monzo| 27/11 0 3/11 -3/11 0 }}, {{monzo| 27/11 0 -8/11 8/11 0 }}, {{monzo| 37/11 0 -2/11 2/11 0 }}] | ||
: Eigenmonzos: 2, 7/5 | : Eigenmonzos: 2, 7/5 | ||
Tuning ranges: | Tuning ranges: | ||
* | * Diamond monotone range: [270.968, 272.727] (7\31 to 5\22) | ||
* | * Diamond tradeoff range: [266.871, 275.659] | ||
* | * Diamond monotone and tradeoff: [270.968, 272.727] | ||
Vals: {{Val list| 9, 22, 31, 53, 84e }} | Vals: {{Val list| 9, 22, 31, 53, 84e }} | ||
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Badness: 0.015231 | Badness: 0.015231 | ||
==== 13-limit | ==== 13-limit ==== | ||
Subgroup: 2.3.5.7.11.13 | Subgroup: 2.3.5.7.11.13 | ||
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Tuning ranges: | Tuning ranges: | ||
* | * Diamond monotone range: [270.968, 271.698] (7\31 to 12\53) | ||
* | * Diamond tradeoff range: [266.871, 275.659] | ||
* | * Diamond monotone and tradeoff: [270.968, 271.698] | ||
Vals: {{Val list| 22, 31, 53, 84e, 137e }} | Vals: {{Val list| 22, 31, 53, 84e, 137e }} | ||
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Badness: 0.019718 | Badness: 0.019718 | ||
==== Blair | ==== Blair ==== | ||
Subgroup: 2.3.5.7.11.13 | Subgroup: 2.3.5.7.11.13 | ||
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Badness: 0.023086 | Badness: 0.023086 | ||
==== Winston | ==== Winston ==== | ||
Subgroup: 2.3.5.7.11.13 | Subgroup: 2.3.5.7.11.13 | ||
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Tuning ranges: | Tuning ranges: | ||
* | * Diamond monotone range: [270.968, 272.727] (7\31 to 5\22) | ||
* | * Diamond tradeoff range: [266.871, 281.691] | ||
* | * Diamond monotone and tradeoff: [270.968, 272.727] | ||
Vals: {{Val list| 22f, 31 }} | Vals: {{Val list| 22f, 31 }} | ||
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Badness: 0.019931 | Badness: 0.019931 | ||
==== Doublethink | ==== Doublethink ==== | ||
Subgroup: 2.3.5.7.11.13 | Subgroup: 2.3.5.7.11.13 | ||
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Tuning ranges: | Tuning ranges: | ||
* | * Diamond monotone range: [135.484, 136.364] (7\62 to 5\44) | ||
* | * Diamond tradeoff range: [128.298, 138.573] | ||
* | * Diamond monotone and tradeoff: [135.484, 136.364] | ||
Vals: {{Val list| 9, 35bd, 44, 53, 62, 115ef, 168eef }} | Vals: {{Val list| 9, 35bd, 44, 53, 62, 115ef, 168eef }} | ||
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Badness: 0.027120 | Badness: 0.027120 | ||
=== Newspeak | === Newspeak === | ||
Subgroup: 2.3.5.7.11 | Subgroup: 2.3.5.7.11 | ||
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Tuning ranges: | Tuning ranges: | ||
* | * Diamond monotone range: [270.968, 271.698] (7\31 to 12\53) | ||
* | * Diamond tradeoff range: [266.871, 272.514] | ||
* | * Diamond monotone and tradeoff: [270.968, 271.698] | ||
Vals: {{Val list| 31, 84, 115, 376b, 491bd, 606bde }} | Vals: {{Val list| 31, 84, 115, 376b, 491bd, 606bde }} | ||
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Badness: 0.031438 | Badness: 0.031438 | ||
=== Borwell | === Borwell === | ||
Subgroup: 2.3.5.7.11 | Subgroup: 2.3.5.7.11 | ||
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Badness: 0.038377 | Badness: 0.038377 | ||
== Triwell | == Triwell == | ||
The triwell temperament (31&159) slices orwell major sixth ~128/75 into three generators, nine of which give the fifth harmonic. | |||
Subgroup: 2.3.5.7 | Subgroup: 2.3.5.7 | ||
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[[Badness]]: 0.080575 | [[Badness]]: 0.080575 | ||
=== 11-limit | === 11-limit === | ||
Subgroup: 2.3.5.7.11 | Subgroup: 2.3.5.7.11 | ||
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Badness: 0.029807 | Badness: 0.029807 | ||
== Quadrawell | == Quadrawell == | ||
The ''quadrawell'' temperament (31&212 | The ''quadrawell'' temperament (31&212) has an [[8/7]] generator of about 232 cents, twelve of which give the fifth harmonic. | ||
Subgroup: 2.3.5.7 | Subgroup: 2.3.5.7 | ||
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[[Badness]]: 0.075754 | [[Badness]]: 0.075754 | ||
=== 11-limit | === 11-limit === | ||
Subgroup: 2.3.5.7.11 | Subgroup: 2.3.5.7.11 | ||
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Badness: 0.036493 | Badness: 0.036493 | ||
== Sabric | == Sabric == | ||
The ''sabric'' temperament (53&190 | The ''sabric'' temperament (53&190) tempers out the [[4375/4374|ragisma]], 4375/4374. It is so named because it is closely related to the '''Sabra2 tuning''' (generator: 271.607278 cents). | ||
Subgroup: 2.3.5.7 | Subgroup: 2.3.5.7 | ||
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[[Badness]]: 0.088355 | [[Badness]]: 0.088355 | ||
== Rainwell | == Rainwell == | ||
The ''rainwell'' temperament (31&265 | The ''rainwell'' temperament (31&265) tempers out the mirkwai comma, 16875/16807 and the [[rainy comma]], 2100875/2097152. | ||
Subgroup: 2.3.5.7 | Subgroup: 2.3.5.7 | ||
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Badness: 0.143488 | Badness: 0.143488 | ||
=== 11-limit | === 11-limit === | ||
Subgroup: 2.3.5.7.11 | Subgroup: 2.3.5.7.11 | ||