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Very low accuracy temperaments: Difference between revisions

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__FORCETOC__
{{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, 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.


Below are listed some very low accuracy temperaments.
== Antitonic ==
This temperament is characterized by [[9/8]] being tempered out and has been termed a "troll temperament" by its namers. Its [[ploidacot]] is diploid acot. It is named on account of 4/3 and 3/2 both being represented by the 600-cent half octave, which, in terms of diatonic function, serves as an antitonic. The 7-limit extension tempers out 15/14 and 21/20, equating 5/4 with 7/6 and 6/5 with 8/7. The 11-limit extension tempers out 12/11 and 33/32. The original 5-limit is basically the 3-limit music of [[2edo]] with the addition of harmonic 5 represented by an independent generator.  


'''''todo: what are the criteria for inclusion here?'''''
[[Subgroup]]: 2.3.5


[[Comma list]]: [[9/8]]


= Enipucrop =
{{Mapping|legend=1| 2 3 0 | 0 0 1 }}
The 5-limit 6b&7 temperament. Its name is "porcupine" spelled backwards, because that's what this temperament is - it's porcupine, with the generator sharp of 2\7 such that the major and minor thirds switch places. The fifths are very flat, meaning that this is more of a melodic temperament than a harmonic one.


Comma: 1125/1024
: mapping generators: ~3/2, ~5


POTE generator: ~16/15 = 173.101
[[Optimal tuning]]s:  
* [[WE]]: ~3/2 = 615.125{{c}}, ~5/4 = 321.597{{c}} (~6/5 = 293.528{{c}})
: [[error map]]: {{val| +30.250 -56.581 -4.217 }}
* [[CWE]]: ~3/2 = 600.000{{c}}, ~5/4 = 336.527{{c}} (~6/5 = 263.473{{c}})
: error map: {{val| 0.000 -101.955 -49.787 }}


Map: [<1 2 2|, <0 -3 2|]
{{Optimal ET sequence|legend=1| 2, 4 }}


EDOs: {{EDOs| 6b, 7 }}
[[Badness]] (Sintel): 0.508


Badness: 0.1439
; Music
* [[:File:Antitonic(8).mp3|''Antitonic(8)'']] (2024) – short composition by [[Wensik]] in POTE-tuned 5-limit antitonic using an 8-note ternary scale.


[http://x31eq.com/cgi-bin/rt.cgi?ets=6b_7&limit=5 The temperament finder - 5-limit Enipucrop]
=== Septimal antitonic ===
Subgroup: 2.3.5.7


=Brutus=
Comma list: 9/8, 15/14
Commas: 10/9, 28/25


POTE generator: ~3/2 = 848.221
Mapping: {{mapping| 2 3 0 1 | 0 0 1 1 }}


Map: [<1 0 -1 -4|, <0 1 2 4|]
Optimal tunings:  
* WE: ~3/2 = 614.759{{c}}, ~7/6 = 309.426{{c}} (~6/5 = 305.334{{c}})
* CWE: ~3/2 = 600.000{{c}}, ~7/6 = 326.047{{c}} (~6/5 = 273.953{{c}})


Wedgie: <<1 2 4 1 4 4||
{{Optimal ET sequence|legend=0| 2, 4 }}


EDOs: 3, 10bc
Badness (Sintel): 0.490


Badness: 0.0534
==== 11-limit ====
Subgroup: 2.3.5.7.11


=Geryon=
Comma list: 9/8, 12/11, 15/14
Commas: 8/7, 25/21


POTE generator: ~5/4 = 385.440
Mapping: {{mapping| 2 3 0 1 7 | 0 0 1 1 0 }}


Map: [<1 1 2 3|, <0 2 1 0|]
Optimal tunings:  
* WE: ~3/2 = 606.293{{c}}, ~5/4 = 343.862{{c}} (~8/7 = 262.431{{c}})
* CWE: ~3/2 = 600.000{{c}}, ~5/4 = 348.102{{c}} (~8/7 = 251.898{{c}})


Wedgie: <<2 1 0 -3 -6 -3||
{{Optimal ET sequence|legend=0| 2, 4 }}


EDOs: <19 31 44 57|, <22 36 51 66|
Badness (Sintel): 0.721


Badness: 0.0510
==== Antietam ====
Subgroup: 2.3.5.7.11


=Antaeus=
Comma list: 9/8, 11/10, 15/14
Commas: 9/8, 35/32


POTE generator: ~5/4 = 315.962
Mapping: {{mapping| 2 3 0 1 2 | 0 0 1 1 1 }}


Map: [<2 3 0 10|, <0 0 1 -1|]
Optimal tunings:  
* WE: ~3/2 = 616.135{{c}}, ~5/4 = 330.741{{c}} (~6/5 = 285.393{{c}})
* CWE: ~3/2 = 600.000{{c}}, ~5/4 = 349.843{{c}} (~8/7 = 250.157{{c}})


Wedgie: <<0 2 -2 3 -3 -10||
{{Optimal ET sequence|legend=0| 2, 4e }}


EDOs: 4, 10bd, 12bcd
Badness (Sintel): 0.628


Badness: 0.0375
=== Antaeus ===
Subgroup: 2.3.5.7


=Phlegyas=
Comma list: 9/8, 35/32
Commas: 10/9, 35/32


POTE generator: ~3/2 = 743.135
Mapping: {{mapping| 2 3 0 10 | 0 0 1 -1 }}


Map: [<1 0 -1 6|, <0 1 2 -2|]
Optimal tunings:  
* WE: ~3/2 = 614.854{{c}}, ~5/4 = 323.784{{c}} (~6/5 = 291.070{{c}})
* CWE: ~3/2 = 600.000{{c}}, ~5/4 = 317.349{{c}} (~6/5 = 282.651{{c}})


Wedgie: <<1 2 -2 1 -6 -10||
{{Optimal ET sequence|legend=0| 2d, 4 }}


EDOs: 3, 10c, 11bcd, 13c
Badness (Sintel): 0.950


Badness: 0.0513
==== 11-limit ====
Subgroup: 2.3.5.7.11


=Malacoda=
Comma list: 9/8, 12/11, 35/32
Commas: 15/14, 35/32


POTE generator: ~8/7 = 276.283
Mapping: {{mapping| 2 3 0 10 7 | 0 0 1 -1 0 }}


Map: [<1 0 3 2|, <0 2 -1 1|]
Optimal tunings:  
* WE: ~3/2 = 609.311{{c}}, ~5/4 = 323.110{{c}} (~6/5 = 286.200{{c}})
* CWE: ~3/2 = 600.000{{c}}, ~5/4 = 318.904{{c}} (~6/5 = 281.096{{c}})


Wedge: <<2 -1 1 -6 -4 5||
{{Optimal ET sequence|legend=0| 2d, 4 }}


EDOs: 1, 4, 13bc
Badness (Sintel): 1.12


Badness: 0.0372
== Alteraugment ==
Alteraugment tempers out the [[32/27|Pythagorean minor third (32/27)]]. It is like [[augmented (temperament)|augmented]], but the period represents 4/3 instead of 5/4, and the generator in turn provides 5/4 instead of 3/2. Its ploidacot is triploid acot. [[User:VectorGraphics|Vector Graphics]] suggests the name ''kinsborough'' for this temperament.


=Ugolino=
[[Subgroup]]: 2.3.5
Commas: 15/14, 27/25


POTE generator: ~6/5 = 278.360
[[Comma list]]: [[32/27]]


Map: [<1 0 0 -1|, <0 2 3 5|]
{{Mapping|legend=1| 3 5 0 | 0 0 1 }}


Wedgie: <<2 3 5 0 2 3||
: mapping generators: ~4/3, ~5


EDOs: 4, 13bd
[[Optimal tuning]]s:  
* [[WE]]: ~4/3 = 389.212{{c}}, ~5/4 = 447.530{{c}} (~10/9 = 58.318{{c}})
: [[error map]]: {{val| -32.364 +44.105 -3.512 }}
* [[CWE]]: ~4/3 = 400.000{{c}}, ~5/4 = 434.191{{c}} (~15/16 = 34.191{{c}})
: error map: {{val| 0.000 +98.045 +47.878 }}


Badness: 0.0438
{{Optimal ET sequence|legend=1| 3, 12bcc, 15bbcc }}


=Charon=
[[Badness]] (Sintel): 1.83
Commas: 10/9, 49/45


POTE generator: ~3/2 = 782.604
== Antonian ==
{{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]].  


Map: [<2 0 -2 -1|, <0 1 2 2|]
[[Subgroup]]: 2.3.5


Wedgie: <<2 4 4 2 1 -2||
[[Comma list]]: [[10/9]]


EDOs: 6, 13bd
{{Mapping|legend=1| 1 0 -1 | 0 1 2 }}


Badness: 0.0564
[[Optimal tuning]]s:  
* [[WE]]: ~2 = 1187.236{{c}}, ~3/2 = 767.716{{c}}
: [[error map]]: {{val| -12.764 +52.997 -63.645 }}
* [[CWE]]: ~2 = 1200.000{{c}}, ~3/2 = 767.718{{c}}
: error map: {{val| 0.000 +65.763 -50.877 }}


=Nessus=
{{Optimal ET sequence|legend=1| 2c, 3 }}
Commas: 10/9, 49/48


POTE generator: ~8/7 = 213.117
[[Badness]] (Sintel): 0.392


Map: [<1 0 -1 2|, <0 2 4 1|]
=== Septimal antonian ===
{{See also| Trienstonic clan }}


Wedgie: <<2 4 1 2 -4 -9||
Subgroup: 2.3.5.7


EDOs: 6, 11bc, 17b
Comma list: 10/9, 15/14


Badness: 0.0591
Mapping: {{mapping| 1 0 -1 -2 | 0 1 2 3 }}


=Medusa=
Optimal tunings:
Commas: 15/14, 64/63
* WE: ~2 = 1193.691{{c}}, ~3/2 = 742.509{{c}}
* CWE: ~2 = 1200.000{{c}}, ~3/2 = 743.086{{c}}


POTE generator: ~3/2 = 685.632
{{Optimal ET sequence|legend=0| 2cd, 3d, 5c }}


Map: [<1 0 7 6|, <0 1 -3 -2|]
Badness (Sintel): 0.606


Wedgie: <<1 -3 -2 -7 -6 4||
=== Antonym ===
Subgroup: 2.3.5.7


EDOs: 2, 7, 12c, 14cd
Comma list: 7/6, 10/9


Badness: 0.0427
Mapping: {{mapping| 1 0 -1 1 | 0 1 2 1 }}


=Plutus=
Optimal tunings:
Commas: 15/14, 81/80
* WE: ~2 = 1209.795{{c}}, ~3/2 = 765.995{{c}}
* CWE: ~2 = 1200.000{{c}}, ~3/2 = 765.949{{c}}


POTE generator: ~3/2 = 682.895
{{Optimal ET sequence|legend=0| 2cd, 3 }}


Map: [<1 0 -4 -5|, <0 1 4 5|]
Badness (Sintel): 0.568


Wedgie: <<1 4 5 4 5 0||
=== Antony ===
Subgroup: 2.3.5.7


EDOs: 7, 37bccd, 44bccd
Comma list: 8/7, 10/9


Badness: 0.0453
Mapping: {{mapping| 1 0 -1 3 | 0 1 2 0 }}


[[category:temperament]]
Optimal tunings:
[[category:todo:intro]]
* 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 ===
Subgroup: 2.3.5.7
 
Comma list: 10/9, 28/25
 
Mapping: {{mapping| 1 0 -1 -4 | 0 1 2 4 }}
 
Optimal tunings:
* WE: ~2 = 1158.982{{c}}, ~3/2 = 819.228{{c}}
* CWE: ~2 = 1200.000{{c}}, ~3/2 = 831.346{{c}}
 
{{Optimal ET sequence|legend=0| 3, 7bc }}
 
Badness (Sintel): 1.35
 
=== Phlegyas ===
{{See also| Archytas clan }}
 
Subgroup: 2.3.5.7
 
Comma list: 10/9, 35/32
 
Mapping: {{mapping| 1 0 -1 6 | 0 1 2 -2 }}
 
Optimal tunings:
* WE: ~2 = 1206.510{{c}}, ~3/2 = 747.166{{c}}
* CWE: ~2 = 1200.000{{c}}, ~3/2 = 743.797{{c}}
 
{{Optimal ET sequence|legend=0| 3, 5c, 8c }}
 
Badness (Sintel): 1.30
 
=== Charon ===
{{See also| Jubilismic clan }}
 
Subgroup: 2.3.5.7
 
Comma list: 10/9, 49/45
 
Mapping: {{mapping| 2 0 -2 -1 | 0 1 2 2 }}
: mapping generators: ~7/5, ~3
 
Optimal tunings:
* WE: ~7/5 = 593.832{{c}}, ~3/2 = 774.559{{c}} (~15/14 = 180.726{{c}})
* CWE: ~7/5 = 600.000{{c}}, ~3/2 = 774.466{{c}} (~15/14 = 174.466{{c}})
 
{{Optimal ET sequence|legend=0| 4bcd, 6 }}
 
Badness (Sintel): 1.43
 
=== Nessus ===
{{See also| Semaphoresmic clan }}
 
Subgroup: 2.3.5.7
 
Comma list: 10/9, 49/48
 
Mapping: {{mapping| 1 0 -1 2 | 0 2 4 1 }}
: mapping generators: ~2, ~7/4
 
Optimal tunings:
* WE: ~2 = 1189.201{{c}}, ~7/4 = 978.002{{c}}
* CWE: ~2 = 1200.000{{c}}, ~7/4 = 983.918{{c}}
 
{{Optimal ET sequence|legend=0| 5c, 6 }}
 
Badness (Sintel): 1.49
 
== Ternary ==
Ternary is identical to [[3edo|3et]] in the 5-limit, but has an independent generator for prime 7.
 
[[Subgroup]]: 2.3.5.7
 
[[Comma list]]: 10/9, 16/15
 
{{Mapping|legend=1| 3 5 7 0 | 0 0 0 1 }}
 
: mapping generators: ~5/4, ~7
 
[[Optimal tuning]]s:
* [[WE]]: ~5/4 = 391.796{{c}}, ~7/4 = 1012.806{{c}} (~15/14 = 162.582{{c}})
: [[error map]]: {{val| -24.612 +57.026 -43.741 -5.243 }}
* [[CWE]]: ~5/4 = 400.000{{c}}, ~7/4 = 1016.378{{c}} (~8/7 = 183.622{{c}})
: error map: {{val| 0.000 +98.045 +13.686 +47.552 }}
 
{{Optimal ET sequence|legend=1| 3d, 6, 9bd }}
 
[[Badness]] (Sintel): 0.726
 
=== 11-limit ===
Subgroup: 2.3.5.7.11
 
Comma list: 10/9, 16/15, 22/21
 
Mapping: {{mapping| 3 5 7 0 2 | 0 0 0 1 1 }}
 
Optimal tunings:
* WE: ~5/4 = 391.788{{c}}, ~7/4 = 1011.942{{c}} (~12/11 = 163.422{{c}})
* CWE: ~5/4 = 400.000{{c}}, ~7/4 = 1013.973{{c}} (~12/11 = 186.027{{c}})
 
{{Optimal ET sequence|legend=0| 3de, 6 }}
 
Badness (Sintel): 0.846
 
== Quad ==
Quad is identical to [[4edo|4et]] in the 5-limit, but has an independent generator for prime 7.
 
[[Subgroup]]: 2.3.5.7
 
[[Comma list]]: 9/8, 25/24
 
{{Mapping|legend=1| 4 6 9 0 | 0 0 0 1 }}
 
[[Optimal tuning]]s:
* [[WE]]: ~6/5 = 308.074{{c}}, ~7/4 = 963.670{{c}}
: [[error map]]: {{val| +32.295 -53.513 -13.650 -5.150 }}
* [[CWE]]: ~6/5 = 300.000{{c}}, ~7/4 = 897.589{{c}}
: error map: {{val| 0.000 -101.955 -86.314 -71.236 }}
 
{{Optimal ET sequence|legend=1| 4 }}
 
[[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 way more accurately approximated than 5 by 5edo, this temperament provides little improvement to 5edo's 7-limit tuning, so in what way this temperament is useful remains unexplained. 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, ~7/4 = 1002.701 (~28/27 = 57.038) <!-- Please review, last digit may be wrong -->
: [[error map]]: {{val| -17.921 -10.628 +50.676 -1.966 }}
* [[CWE]]: ~6/5 = 240.000, ~7/4 = 1005.135 (~28/27 = 45.135)
: error map: {{val| 0.000 +18.045 +93.686 +36.309 }}
 
{{Optimal ET sequence|legend=1| 5, 15ccd }}
 
[[Badness]] (Sintel): 1.22
 
== Geryon ==
{{See also| Dicot family }}
 
[[Subgroup]]: 2.3.5.7
 
[[Comma list]]: 8/7, 25/21
 
{{Mapping|legend=1| 1 1 2 3 | 0 2 1 0 }}
 
[[Optimal tuning]]s:
* [[WE]]: ~2 = 1164.885{{c}}, ~5/4 = 374.162{{c}}
: [[error map]]: {{val| -35.115 +11.253 -82.382 +125.830 }}
* [[CWE]]: ~2 = 1200.000{{c}}, ~5/4 = 375.277{{c}}
: error map: {{val| 0.000 +48.600 -11.036 +231.174 }}
 
{{Optimal ET sequence|legend=1| 1b, 2b, 3d }}
 
[[Badness]] (Sintel): 1.29
 
== Malacoda ==
{{See also| Semaphoresmic clan }}
 
[[Subgroup]]: 2.3.5.7
 
[[Comma list]]: 15/14, 35/32
 
{{Mapping|legend=1| 1 0 3 2 | 0 2 -1 1 }}
 
: mapping generators: ~2, ~7/4
 
[[Optimal tuning]]s:
* [[WE]]: ~2 = 1223.542{{c}}, ~7/4 = 941.838{{c}}
: [[error map]]: {{val| +23.542 -18.278 -57.528 +20.096 }}
* [[CWE]]: ~2 = 1200.000{{c}}, ~7/4 = 927.096{{c}}
: error map: {{val| 0.000 -47.763 -113.410 -41.730 }}
 
{{Optimal ET sequence|legend=1| 1, 3b, 4, 9c, 13bcc }}
 
[[Badness]] (Sintel): 0.942
 
== Ugolino ==
{{See also| Bug family }}
 
[[Subgroup]]: 2.3.5.7
 
[[Comma list]]: 15/14, 27/25
 
{{Mapping|legend=1| 1 0 0 -1 | 0 2 3 5 }}
 
[[Optimal tuning]]s:
* [[WE]]: ~2 = 1206.628{{c}}, ~7/4 = 926.730{{c}}
: [[error map]]: {{val| +6.628 -48.494 -6.122 +58.198 }}
* [[CWE]]: ~2 = 1200.000{{c}}, ~7/4 = 923.776{{c}}
: error map: {{val| 0.000 -54.403 -14.986 +50.054 }}
 
{{Optimal ET sequence|legend=1| 1cdd, 3bcdd, 4, 9d }}
 
[[Badness]] (Sintel): 1.11
 
== Medusa ==
{{See also| Archytas clan | Mavila family }}
 
[[Subgroup]]: 2.3.5.7
 
[[Comma list]]: 15/14, 64/63
 
{{Mapping|legend=1| 1 0 7 6 | 0 1 -3 -2 }}
 
[[Optimal tuning]]s:
* [[WE]]: ~2 = 1200.960{{c}}, ~3/2 = 686.181{{c}}
: [[error map]]: {{val| +0.960 -14.814 -41.014 +62.655 }}
* [[CWE]]: ~2 = 1200.000{{c}}, ~3/2 = 685.511{{c}}
: error map: {{val| 0.000 -16.443 -42.849 +60.150 }}
 
{{Optimal ET sequence|legend=1| 2, 5c, 7 }}
 
[[Badness]] (Sintel): 1.08
 
=== 11-limit ===
Subgroup: 2.3.5.7.11
 
Comma list: 15/14, 22/21, 33/32
 
Mapping: {{mapping| 1 0 7 6 5 | 0 1 -3 -2 -1 }}
 
Optimal tunings:
* WE: ~2 = 1202.757{{c}}, ~3/2 = 687.384{{c}}
* CWE: ~2 = 1200.000{{c}}, ~3/2 = 685.462{{c}}
 
{{Optimal ET sequence|legend=0| 2, 5c, 7 }}
 
Badness (Sintel): 0.887
 
== Wallaby ==
{{See also| Trienstonic clan | Mavila family }}
 
[[Subgroup]]: 2.3.5.7
 
[[Comma list]]: 28/27, 35/32
 
{{Mapping|legend=1| 1 0 7 -2 | 0 1 -3 3 }}
 
[[Optimal tuning]]s:
* [[WE]]: ~2 = 1216.024{{c}}, ~3/2 = 700.583{{c}}
: [[error map]]: {{val| +16.024 +14.652 -23.967 -51.053 }}
* [[CWE]]: ~2 = 1200.000{{c}}, ~3/2 = 691.757{{c}}
: error map: {{val| 0.000 -10.198 -61.585 -93.555 }}
 
{{Optimal ET sequence|legend=1| 2d, 5c, 7d, 19ccdd }}
 
[[Badness]] (Sintel): 1.48
 
== Plutus ==
{{Distinguish| Pluto }}
{{See also| Meantone family }}
 
[[Subgroup]]: 2.3.5.7
 
[[Comma list]]: 15/14, 81/80
 
{{Mapping|legend=1| 1 0 -4 -5 | 0 1 4 5 }}
 
[[Optimal tuning]]s:
* [[WE]]: ~2 = 1203.936{{c}}, ~3/2 = 685.135{{c}}
: [[error map]]: {{val| +3.936 -12.884 -45.774 +56.849 }}
* [[CWE]]: ~2 = 1200.000{{c}}, ~3/2 = 683.935{{c}}
: error map: {{val| 0.000 -18.020 -50.573 +50.850 }}
 
{{Optimal ET sequence|legend=1| 2cd, 5d, 7 }}
 
[[Badness]] (Sintel): 1.14
 
=== 11-limit ===
Subgroup: 2.3.5.7.11
 
Comma list: 15/14, 22/21, 81/80
 
Mapping: {{mapping| 1 0 -4 -5 -6 | 0 1 4 5 6 }}
 
Optimal tunings:
* WE: ~2 = 1203.293{{c}}, ~3/2 = 687.114{{c}}
* CWE: ~2 = 1200.000{{c}}, ~3/2 = 686.078{{c}}
 
{{Optimal ET sequence|legend=0| 2cde, 5de, 7 }}
 
Badness (Sintel): 1.08
 
== Involution ==
Involution tempers out the [[45/32|ptolemaic augmented fourth (45/32)]]. Its ploidacot is monocot. It was named by [[User:CompactStar|CompactStar]] in 2023.
 
[[Subgroup]]: 2.3.5
 
[[Comma list]]: [[45/32]]
 
{{Mapping|legend=1| 1 0 5 | 0 1 -2 }}
 
: mapping generators: ~2, ~3
 
[[Optimal tuning]]s:
* [[WE]]: ~2 = 1265.406{{c}}, ~3/2 = 552.346{{c}}
: [[error map]]: {{val| +65.405 -84.203 -94.789 }}
* [[CWE]]: ~2 = 1200.000{{c}}, ~3/2 = 520.626{{c}}
: error map: {{val| 0.000 -181.329 -227.565 }}
 
{{Optimal ET sequence|legend=1| 2c, 5bc, 7bbcc }}
 
[[Badness]] (Sintel): 3.12
 
=== 7-limit ===
Subgroup: 2.3.5.7
 
Comma list: 8/7, 45/28
 
Mapping: {{mapping| 1 0 5 3 | 0 1 -2 0 }}
 
Optimal tunings:
* WE: ~2 = 1205.230{{c}}, ~3/2 = 517.557{{c}}
* CWE: ~2 = 1200.000{{c}}, ~3/2 = 515.099{{c}}
 
Optimal ET sequence: none
 
Badness (Sintel): 3.01
 
== Devolution ==
Devolution was named by [[User:Akselai|Akselai]] in 2024.
 
[[Subgroup]]: 3.5.7
 
[[Comma list]]: [[35/27]]
 
{{Mapping|legend=1| 1 0 3 | 0 1 -1 }}
 
: mapping generators: ~3, ~5
 
[[Optimal tuning]]s:
* [[WE]]: ~3 = 1988.549{{c}}, ~5/3 = 719.679{{c}}
: [[error map]]: {{val| +86.594 -78.085 -111.407 }}
* [[CWE]]: ~3 = 1901.955{{c}}, ~5/3 = 691.468{{c}}
: error map: {{val| 0.000 -192.891 -256.384 }}
 
[[Optimal ET sequence]]: [[1edt|b1]], [[2edt|b2d]], [[3edt|b3]], [[8edt|b8cdd]]
 
[[Badness]] (Sintel): 0.751
 
== Codex ==
{{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 dicot.
 
[[Subgroup]]: 2.3.5.7
 
[[Comma list]]: [[27/25]], [[50/49]]
 
{{Mapping|legend=1| 2 0 0 1 | 0 2 3 3 }}
 
[[Optimal tuning]]s:
* [[WE]]: ~7/5 = 598.589{{c}}, ~5/3 = 934.978{{c}}
: [[error map]]: {{val| -2.821 -31.998 +18.621 +34.699 }}
* [[CWE]]: ~7/5 = 600.000{{c}}, ~5/3 = 936.030{{c}}
: error map: {{val| 0.000 -29.895 +21.776 +39.264 }}
 
{{Optimal ET sequence|legend=1| 4, 10cd, 14d }}
 
[[Badness]] (Sintel): 1.95
 
== Oxygen ==
{{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 either of those intervals 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
 
[[Comma list]]: 21/20, 175/162
 
{{Mapping|legend=1| 1 2 3 3 | 0 -3 -5 -2 }}
 
[[Optimal tuning]]s:
* [[WE]]: ~2 = 1213.695{{c}}, ~10/9 = 171.042{{c}}
: error map: {{val| +13.695 +12.309 -0.438 -69.825 }}
* [[CWE]]: ~2 = 1200.000{{c}}, ~10/9 = 166.042{{c}}
: error map: {{val| 0.000 -0.083 -16.526 -100.911 }}
 
{{Optimal ET sequence|legend=1| 1c, …, 6bcd, 7d }}*
 
<nowiki/>*[[Optimal patent val]]: [[8edo|8]]
 
[[Badness]] (Sintel): 1.52
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