Very low accuracy temperaments: Difference between revisions
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{{Technical data page}} | {{Technical data page}} | ||
Below are listed some '''very low accuracy temperaments'''. Temperaments with exceedingly low accuracy such as these tend to [[tempering out|temper out]] very large intervals such as [[9/8]], [[10/9]], [[32/27]], or [[15/14]], equating wildly different interval sizes with [[semitone (interval size measure)|semitone]]-level or even greater [[error]]s | Below are listed some '''very low accuracy temperaments'''. Temperaments with exceedingly low accuracy such as these tend to [[tempering out|temper out]] very large intervals such as [[9/8]], [[10/9]], [[32/27]], or [[15/14]], equating wildly different interval sizes with [[semitone (interval size measure)|semitone]]-level or even greater [[error]]s, and often swapping the sizes of simple ratios compared to just intonation. As a result, all of them are right on or even beyond the edge of what can be sensibly called a temperament at all; that is to say, they are [[exotemperament]]s. | ||
== Antitonic == | == Antitonic == | ||
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* [[:File:Antitonic(8).mp3|''Antitonic(8)'']] (2024) – short composition by [[Wensik]] in POTE-tuned 5-limit antitonic using an 8-note ternary scale. | * [[:File:Antitonic(8).mp3|''Antitonic(8)'']] (2024) – short composition by [[Wensik]] in POTE-tuned 5-limit antitonic using an 8-note ternary scale. | ||
=== | === Septimal antitonic === | ||
Subgroup: 2.3.5.7 | Subgroup: 2.3.5.7 | ||
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[[Badness]] (Sintel): 1.83 | [[Badness]] (Sintel): 1.83 | ||
== | == Antonian == | ||
This temperament family is characterized by the [[color notation|yo 2nd]] ([[10/9]]) being tempered out. | {{Main| Antonian }} | ||
This temperament family is characterized by the [[color notation|yo 2nd]] ([[10/9]]) being tempered out. It identifies [[3/2]] with [[5/3]], [[4/3]] with [[6/5]], and [[5/4]] with [[9/8]]. | |||
[[Subgroup]]: 2.3.5 | [[Subgroup]]: 2.3.5 | ||
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[[Badness]] (Sintel): 0.392 | [[Badness]] (Sintel): 0.392 | ||
=== Septimal antonian === | |||
{{See also| Trienstonic clan }} | |||
Subgroup: 2.3.5.7 | |||
Comma list: 10/9, 15/14 | |||
Mapping: {{mapping| 1 0 -1 -2 | 0 1 2 3 }} | |||
Optimal tunings: | |||
* WE: ~2 = 1193.691{{c}}, ~3/2 = 742.509{{c}} | |||
* CWE: ~2 = 1200.000{{c}}, ~3/2 = 743.086{{c}} | |||
{{Optimal ET sequence|legend=0| 2cd, 3d, 5c }} | |||
Badness (Sintel): 0.606 | |||
=== Antonym === | |||
Subgroup: 2.3.5.7 | |||
Comma list: 7/6, 10/9 | |||
Mapping: {{mapping| 1 0 -1 1 | 0 1 2 1 }} | |||
Optimal tunings: | |||
* WE: ~2 = 1209.795{{c}}, ~3/2 = 765.995{{c}} | |||
* CWE: ~2 = 1200.000{{c}}, ~3/2 = 765.949{{c}} | |||
{{Optimal ET sequence|legend=0| 2cd, 3 }} | |||
Badness (Sintel): 0.568 | |||
=== Antony === | |||
Subgroup: 2.3.5.7 | |||
Comma list: 8/7, 10/9 | |||
Mapping: {{mapping| 1 0 -1 3 | 0 1 2 0 }} | |||
Optimal tunings: | |||
* WE: ~2 = 1151.235{{c}}, ~3/2 = 789.399{{c}} | |||
* CWE: ~2 = 1200.000{{c}}, ~3/2 = 800.996{{c}} | |||
{{Optimal ET sequence|legend=0| 1c, 3d }} | |||
Badness (Sintel): 0.720 | |||
=== Brutus === | === Brutus === | ||
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=== Phlegyas === | === Phlegyas === | ||
{{See also| Archytas clan }} | |||
Subgroup: 2.3.5.7 | Subgroup: 2.3.5.7 | ||
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=== Charon === | === Charon === | ||
{{See also| Jubilismic clan }} | |||
Subgroup: 2.3.5.7 | Subgroup: 2.3.5.7 | ||
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== Quad == | == Quad == | ||
Quad is identical to 4et in the 5-limit, but has an independent generator for prime 7. | Quad is identical to [[4edo|4et]] in the 5-limit, but has an independent generator for prime 7. | ||
[[Subgroup]]: 2.3.5.7 | [[Subgroup]]: 2.3.5.7 | ||
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[[Badness]] (Sintel): 1.16 | [[Badness]] (Sintel): 1.16 | ||
== Quint == | |||
Quint preserves the 5-limit mapping of 5edo, and harmonic 7 is mapped to an independent generator. As harmonic 7 is already quite accurately approximated by 5edo for its size, this temperament provides little improvement, so it is only provided below for bookkeeping purposes. It would make much more sense to, for example, preserve the 2.3.7-subgroup structure of 5edo and give prime 5 an independent generator instead, which is exactly what [[blackwood]] does. | |||
[[Subgroup]]: 2.3.5.7 | |||
[[Comma list]]: 16/15, 27/25 | |||
{{Mapping|legend=1| 5 8 12 0 | 0 0 0 1 }} | |||
: Mapping generators: ~6/5, ~7 | |||
[[Optimal tuning]]s: | |||
* [[WE]]: ~6/5 = 236.416{{c}}, ~7/4 = 1002.701{{c}} (~28/27 = 57.038{{c}}) | |||
: [[error map]]: {{val| -17.921 -10.628 +50.676 -1.966 }} | |||
* [[CWE]]: ~6/5 = 240.000{{c}}, ~7/4 = 1005.135{{c}} (~28/27 = 45.135{{c}}) | |||
: error map: {{val| 0.000 +18.045 +93.686 +36.309 }} | |||
{{Optimal ET sequence|legend=1| 5, 15ccd, 20cccd }} | |||
[[Badness]] (Sintel): 1.22 | |||
== Geryon == | == Geryon == | ||
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== Plutus == | == Plutus == | ||
{{Distinguish| Pluto }} | |||
{{See also| Meantone family }} | {{See also| Meantone family }} | ||
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Badness (Sintel): 1.08 | Badness (Sintel): 1.08 | ||
== Codex == | == Codex == | ||
{{See also| Bug family }} | {{See also| Bug family }} | ||
Codex was named by [[User:Jerdle|Jerdle]] as an abbreviation of "co-decimal", as it resembles [[decimal]] in many ways, but exchanges the roles of 5's and 7's. While decimal equates [[8/7]] and [[7/6]], as well as [[6/5]] and [[5/4]], this equates [[10/9]] and [[6/5]], as well as [[7/6]] and [[9/7]]. It is an extension of [[bug]] and [[54/49|mujannabic]] in the same way decimal is of [[semaphore]] and [[dicot]]. Its ploidacot is diploid | Codex was named by [[User:Jerdle|Jerdle]] as an abbreviation of "co-decimal", as it resembles [[decimal]] in many ways, but exchanges the roles of 5's and 7's. While decimal equates [[8/7]] and [[7/6]], as well as [[6/5]] and [[5/4]], this equates [[10/9]] and [[6/5]], as well as [[7/6]] and [[9/7]]. It is an extension of [[bug]] and [[54/49|mujannabic]] in the same way decimal is of [[semaphore]] and [[dicot]]. Its ploidacot is diploid dicot. | ||
[[Subgroup]]: 2.3.5.7 | [[Subgroup]]: 2.3.5.7 | ||
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[[Optimal tuning]]s: | [[Optimal tuning]]s: | ||
* [[WE]]: ~7/5 = 598.589{{c}}, ~5/3 = 934.978{{c}} | * [[WE]]: ~7/5 = 598.589{{c}}, ~5/3 = 934.978{{c}} | ||
: error map: {{val| -2.821 -31.998 +18.621 +34.699 }} | : [[error map]]: {{val| -2.821 -31.998 +18.621 +34.699 }} | ||
* [[CWE]]: ~7/5 = 600.000{{c}}, ~5/3 = 936.030{{c}} | * [[CWE]]: ~7/5 = 600.000{{c}}, ~5/3 = 936.030{{c}} | ||
: error map: {{val| 0.000 -29.895 +21.776 +39.264 }} | : error map: {{val| 0.000 -29.895 +21.776 +39.264 }} | ||
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== Oxygen == | == Oxygen == | ||
{{See also| Porcupine family }} | {{See also| Porcupine family }} | ||
Oxygen extends porcupine into the 7-limit by conflating 6/5 with 8/7. While this means it does not represent | Oxygen extends porcupine into the 7-limit by conflating 6/5 with 8/7, and conflating 10/9 with 7/6. While this means it does not represent 7-limit JI with any real accuracy, it is still of interest because its comma basis suggests potential utility to construct [[fokker block|Fokker blocks]]. | ||
[[Subgroup]]: 2.3.5.7 | [[Subgroup]]: 2.3.5.7 | ||
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: error map: {{val| 0.000 -0.083 -16.526 -100.911 }} | : error map: {{val| 0.000 -0.083 -16.526 -100.911 }} | ||
{{Optimal ET sequence|legend=1| 1c, …, 6bcd, 7d }} | {{Optimal ET sequence|legend=1| 1c, …, 6bcd, 7d }}* | ||
<nowiki/>* [[optimal patent val]]: [[8edo|8]] | |||
[[Badness]] (Sintel): 1.52 | [[Badness]] (Sintel): 1.52 | ||