Compton family: Difference between revisions
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The ''' | {{Technical data page}} | ||
The '''compton family''', otherwise known as the '''aristoxenean family''', of [[regular temperament|temperaments]] [[tempering out|tempers out]] the [[Pythagorean comma]] ([[ratio]]: 531441/524288, {{monzo|legend=1| -19 12 }}, and hence the fifths form a closed 12-note [[circle of fifths]], identical to [[12edo]]. While the tuning of the fifth will be that of 12edo, two [[cent]]s flat, the tuning of the larger primes is not so constrained, and the point of these temperaments is to improve on it. | |||
== Compton == | == Compton == | ||
{{Main| Compton }} | |||
[[ | 5-limit compton is also known as ''aristoxenean''. It tempers out the Pythagorean comma and has a period of 1\12, so it is the 12edo circle of fifths with an independent dimension for the harmonic 5. Equivalent generators are [[5/4]], [[6/5]], [[10/9]], [[16/15]] (the [[secor]]), [[45/32]], [[135/128]] and most importantly, [[81/80]]. In terms of [[equal temperament]]s, it is the {{nowrap| 12 & 72 }} temperament, and [[72edo]], [[84edo]] or [[240edo]] make for good tunings. | ||
[[ | [[Subgroup]]: 2.3.5 | ||
[[ | [[Comma list]]: 531441/524288 | ||
{{ | {{Mapping|legend=1| 12 19 0 | 0 0 1 }} | ||
[[Badness]]: 0.094494 | : mapping generators: ~256/243, ~5 | ||
[[Optimal tuning]]s: | |||
* [[CTE]]: ~256/243 = 100.000, ~5/4 = 386.314 (~81/80 = 13.686) | |||
: [[error map]]: {{val| 0.000 -1.955 0.000 }} | |||
* [[POTE]]: ~256/243 = 100.000, ~5/4 = 384.884 (~81/80 = 15.116) | |||
: error map: {{val| 0.000 -1.955 -1.431 }} | |||
{{Optimal ET sequence|legend=1| 12, 48, 60, 72, 84, 156, 240, 396b, 636bbc }} | |||
[[Badness]] (Smith): 0.094494 | |||
== Septimal compton == | == Septimal compton == | ||
In terms of the normal list, compton adds 413343/409600 | {{Main| Compton }} | ||
Septimal compton is also known as ''waage''. In terms of the normal list, compton adds 413343/409600 ({{monzo| -14 10 -2 1 }}) to the Pythagorean comma; however, it can also be characterized by saying it adds [[225/224]]. | |||
In either the 5 or 7-limit, | In either the 5- or 7-limit, 240edo is an excellent tuning, with 81/80 coming in at 15 cents exactly. In the 12edo, the major third is sharp by 13.686 cents, and the minor third flat by 15.641 cents; adjusting these down and up by 15 cents puts them in excellent tune. | ||
In terms of the normal comma list, we may add 8019/8000 to get to the 11-limit version of compton, which also adds [[441/440]]. For this | In terms of the normal comma list, we may add 8019/8000 to get to the 11-limit version of compton, which also adds [[441/440]]. For this 72edo can be recommended as a tuning. In 11-limit compton, intervals of 5 are off by one generator, intervals of 7 are off by two generators, and intervals of 11 are off by 3 generators. | ||
Subgroup: 2.3.5.7 | [[Subgroup]]: 2.3.5.7 | ||
[[Comma list]]: 225/224, 250047/250000 | [[Comma list]]: 225/224, 250047/250000 | ||
{{Mapping|legend=1| 12 19 0 -22 | 0 0 1 2 }} | |||
[[POTE | [[Optimal tuning]]s: | ||
* [[CTE]]: ~200/189 = 100.000, ~5/4 = 384.922 (~126/125 = 15.078) | |||
: [[error map]]: {{val| 0.000 -1.955 -1.392 -1.017 }} | |||
* [[POTE]]: ~200/189 = 100.000, ~5/4 = 383.775 (~126/125 = 16.225) | |||
: error map: {{val| 0.000 -1.955 -2.538 -1.275 }} | |||
{{ | {{Optimal ET sequence|legend=1| 12, 48d, 60, 72, 228, 300c, 372bc, 444bc }} | ||
[[Badness]]: 0.035686 | [[Badness]] (Smith): 0.035686 | ||
=== 11-limit === | === 11-limit === | ||
Line 38: | Line 55: | ||
Comma list: 225/224, 441/440, 4375/4356 | Comma list: 225/224, 441/440, 4375/4356 | ||
Mapping: | Mapping: {{mapping| 12 19 0 -22 -42 | 0 0 1 2 3 }} | ||
POTE | Optimal tunings: | ||
* CTE: ~35/33 = 100.000, ~5/4 = 384.324 (~100/99 = 15.676) | |||
* POTE: ~35/33 = 100.000, ~5/4 = 383.266 (~100/99 = 16.734) | |||
Optimal | {{Optimal ET sequence|legend=0| 12, 48dee, 60e, 72 }} | ||
Badness: 0.022235 | Badness (Smith): 0.022235 | ||
==== 13-limit ==== | ==== 13-limit ==== | ||
Line 51: | Line 70: | ||
Comma list: 225/224, 351/350, 364/363, 441/440 | Comma list: 225/224, 351/350, 364/363, 441/440 | ||
Mapping: | Mapping: {{mapping| 12 19 0 -22 -42 -67 | 0 0 1 2 3 4 }} | ||
POTE | Optimal tunings: | ||
* CTE: ~35/33 = 100.000, ~5/4 = 384.685 (~105/104 = 15.315) | |||
* POTE: ~35/33 = 100.000, ~5/4 = 383.963 (~105/104 = 16.037) | |||
Optimal | {{Optimal ET sequence|legend=0| 12f, 48deefff, 60eff, 72, 228f }} | ||
Badness: 0.021852 | Badness (Smith): 0.021852 | ||
===== 17-limit ===== | ===== 17-limit ===== | ||
Line 64: | Line 85: | ||
Comma list: 221/220, 225/224, 289/288, 351/350, 441/440 | Comma list: 221/220, 225/224, 289/288, 351/350, 441/440 | ||
Mapping: | Mapping: {{mapping| 12 19 0 -22 -42 -67 49 | 0 0 1 2 3 4 0 }} | ||
POTE | Optimal tunings: | ||
* CTE: ~18/17 = 100.000, ~5/4 = 384.685 (~105/104 = 15.315) | |||
* POTE: ~18/17 = 100.000, ~5/4 = 383.750 (~105/104 = 16.250) | |||
Optimal | {{Optimal ET sequence|legend=0| 12f, 60eff, 72 }} | ||
Badness: 0.017131 | Badness (Smith): 0.017131 | ||
==== Comptone ==== | ==== Comptone ==== | ||
Line 77: | Line 100: | ||
Comma list: 225/224, 325/324, 441/440, 1001/1000 | Comma list: 225/224, 325/324, 441/440, 1001/1000 | ||
Mapping: | Mapping: {{mapping| 12 19 0 -22 -42 100 | 0 0 1 2 3 -2 }} | ||
POTE | Optimal tunings: | ||
* CTE: ~35/33 = 100.000, ~5/4 = 383.552 (~100/99 = 16.448) | |||
* POTE: ~35/33 = 100.000, ~5/4 = 382.612 (~100/99 = 17.388) | |||
Optimal | {{Optimal ET sequence|legend=0| 12, 60e, 72, 204cdef, 276cdeff }} | ||
Badness: 0.025144 | Badness (Smith): 0.025144 | ||
===== 17-limit ===== | ===== 17-limit ===== | ||
Line 90: | Line 115: | ||
Comma list: 225/224, 273/272, 289/288, 325/324, 441/440 | Comma list: 225/224, 273/272, 289/288, 325/324, 441/440 | ||
Mapping: | Mapping: {{mapping| 12 19 0 -22 -42 100 49 | 0 0 1 2 3 -2 0 }} | ||
POTE | Optimal tunings: | ||
* CTE: ~18/17 = 100.000, ~5/4 = 383.552 (~100/99 = 16.448) | |||
* POTE: ~18/17 = 100.000, ~5/4 = 382.597 (~100/99 = 17.403) | |||
Optimal | {{Optimal ET sequence|legend=0| 12, 60e, 72, 204cdefg, 276cdeffgg }} | ||
Badness: 0.016361 | Badness (Smith): 0.016361 | ||
== Catler == | == Catler == | ||
In terms of the normal comma list, catler is characterized by the addition of the [[schisma]], 32805/32768, to the Pythagorean comma, though it can also be characterized as adding | In terms of the normal comma list, catler is characterized by the addition of the [[schisma]], 32805/32768, to the Pythagorean comma, though it can also be characterized as adding 81/80, [[128/125]] or [[648/625]]. In any event, the 5-limit is exactly the same as the 5-limit of 12edo. Catler can also be characterized as the {{nowrap| 12 & 24 }} temperament. [[36edo]] or [[48edo]] are possible tunings. Possible generators are [[36/35]], [[21/20]], [[15/14]], [[8/7]], [[7/6]], [[9/7]], [[7/5]], and most importantly, [[64/63]]. | ||
Subgroup: 2.3.5.7 | [[Subgroup]]: 2.3.5.7 | ||
[[Comma list]]: 81/80, 128/125 | [[Comma list]]: 81/80, 128/125 | ||
{{Mapping|legend=1| 12 19 28 0 | 0 0 0 1 }} | |||
: mapping generators: ~16/15, ~7 | |||
{{ | [[Optimal tuning]]s: | ||
* [[CTE]]: ~16/15 = 100.000, ~7/4 = 968.826 (~64/63 = 31.174) | |||
: [[error map]]: {{val| 0.000 -1.955 +13.686 0.000 }} | |||
* [[POTE]]: ~16/15 = 100.000, ~7/4 = 973.210 (~64/63 = 26.790) | |||
: error map: {{val| 0.000 -1.955 +13.686 +4.384 }} | |||
[[Badness]]: 0.050297 | {{Optimal ET sequence|legend=1| 12, 24, 36, 48c, 84c }} | ||
[[Badness]] (Smith): 0.050297 | |||
=== 11-limit === | === 11-limit === | ||
Line 118: | Line 151: | ||
Comma list: 81/80, 99/98, 128/125 | Comma list: 81/80, 99/98, 128/125 | ||
Mapping: {{mapping| 12 19 28 0 -26 | 0 0 0 1 2 }} | |||
Optimal tunings: | |||
* CTE: ~16/15 = 100.000, ~7/4 = 973.779 (~64/63 = 26.221) | |||
* POTE: ~16/15 = 100.000, ~7/4 = 977.277 (~64/63 = 22.723) | |||
Optimal | {{Optimal ET sequence|legend=0| 12, 36e, 48c }} | ||
Badness: 0.058213 | Badness (Smith): 0.058213 | ||
=== Catlat === | === Catlat === | ||
Line 131: | Line 166: | ||
Comma list: 81/80, 128/125, 540/539 | Comma list: 81/80, 128/125, 540/539 | ||
Mapping: {{mapping| 12 19 28 0 109 | 0 0 0 1 -2 }} | |||
Optimal tunings: | |||
* CTE: ~16/15 = 100.000, ~7/4 = 972.823 (~64/63 = 27.177) | |||
* POTE: ~16/15 = 100.000, ~7/4 = 972.136 (~64/63 = 27.864) | |||
Optimal | {{Optimal ET sequence|legend=0| 12e, 36, 48c, 84c }} | ||
Badness: 0.081909 | Badness (Smith): 0.081909 | ||
=== | === Catnip === | ||
Subgroup: 2.3.5.7.11 | Subgroup: 2.3.5.7.11 | ||
Comma list: 56/55, 81/80, 128/125 | Comma list: 56/55, 81/80, 128/125 | ||
Mapping: {{mapping| 12 19 28 0 8 | 0 0 0 1 1 }} | |||
Optimal tunings: | |||
* CTE: ~16/15 = 100.000, ~7/4 = 961.874 (~64/63 = 38.126) | |||
* POTE: ~16/15 = 100.000, ~7/4 = 967.224 (~64/63 = 32.776) | |||
Optimal | {{Optimal ET sequence|legend=0| 12, 24, 36, 72ce }} | ||
Badness: 0.034478 | Badness (Smith): 0.034478 | ||
==== 13-limit ==== | ==== 13-limit ==== | ||
Line 157: | Line 196: | ||
Comma list: 56/55, 66/65, 81/80, 105/104 | Comma list: 56/55, 66/65, 81/80, 105/104 | ||
Mapping: {{mapping| 12 19 28 0 8 11 | 0 0 0 1 1 1 }} | |||
Optimal tunings: | |||
* CTE: ~16/15 = 100.000, ~7/4 = 956.375 (~40/39 = 43.625) | |||
* POTE: ~16/15 = 100.000, ~7/4 = 962.778 (~40/39 = 37.232) | |||
Optimal | {{Optimal ET sequence|legend=0| 12f, 24, 36f }} | ||
Badness: 0.028363 | Badness (Smith): 0.028363 | ||
===== 17-limit ===== | ===== 17-limit ===== | ||
Line 170: | Line 211: | ||
Comma list: 51/50, 56/55, 66/65, 81/80, 105/104 | Comma list: 51/50, 56/55, 66/65, 81/80, 105/104 | ||
Mapping: {{mapping| 12 19 28 0 8 11 49 | 0 0 0 1 1 1 0 }} | |||
Optimal tunings: | |||
* CTE: ~18/17 = 100.000, ~7/4 = 956.375 (~40/39 = 43.625) | |||
* POTE: ~18/17 = 100.000, ~7/4 = 960.223 (~40/39 = 39.777) | |||
Optimal | {{Optimal ET sequence|legend=0| 12f, 24, 36f }} | ||
Badness: 0.023246 | Badness (Smith): 0.023246 | ||
===== 19-limit ===== | ===== 19-limit ===== | ||
Line 183: | Line 226: | ||
Comma list: 51/50, 56/55, 66/65, 76/75, 81/80, 96/95 | Comma list: 51/50, 56/55, 66/65, 76/75, 81/80, 96/95 | ||
Mapping: {{mapping| 12 19 28 0 8 11 49 51 | 0 0 0 1 1 1 0 0 }} | |||
Optimal tunings: | |||
* CTE: ~18/17 = 100.000, ~7/4 = 956.375 (~40/39 = 43.625) | |||
* POTE: ~18/17 = 100.000, ~7/4 = 959.835 (~40/39 = 40.165) | |||
Optimal | {{Optimal ET sequence|legend=0| 12f, 24, 36f }} | ||
Badness: 0.018985 | Badness (Smith): 0.018985 | ||
==== Duodecic ==== | ==== Duodecic ==== | ||
Line 196: | Line 241: | ||
Comma list: 56/55, 81/80, 91/90, 128/125 | Comma list: 56/55, 81/80, 91/90, 128/125 | ||
Mapping: {{mapping| 12 19 28 0 8 78 | 0 0 0 1 1 -1 }} | |||
Optimal tunings: | |||
* CTE: ~16/15 = 100.000, ~7/4 = 961.255 (~64/63 = 38.745) | |||
* POTE: ~16/15 = 100.000, ~7/4 = 962.312 (~64/63 = 37.688) | |||
Optimal | {{Optimal ET sequence|legend=0| 12, 24, 36 }} | ||
Badness: 0.038307 | Badness (Smith): 0.038307 | ||
===== 17-limit ===== | ===== 17-limit ===== | ||
Subgroup: 2.3.5.7.11.13.17 | Subgroup: 2.3.5.7.11.13.17 | ||
Comma list: 51/50, 56/55, 81/80, 91/90, 128/125 | Comma list: 51/50, 56/55, 81/80, 91/90, 128/125 | ||
Mapping:{{mapping| 12 19 28 0 8 78 49 | 0 0 0 1 1 -1 0 }} | |||
Optimal tunings: | |||
* CTE: ~18/17 = 100.000, ~7/4 = 961.255 (~64/63 = 38.745) | |||
* POTE: ~18/17 = 100.000, ~7/4 = 961.903 (~64/63 = 38.097) | |||
Optimal | {{Optimal ET sequence|legend=0| 12, 24, 36, 60c }} | ||
Badness: 0.027487 | Badness (Smith): 0.027487 | ||
===== 19-limit ===== | ===== 19-limit ===== | ||
Line 221: | Line 271: | ||
Comma list: 51/50, 56/55, 76/75, 81/80, 91/90, 96/95 | Comma list: 51/50, 56/55, 76/75, 81/80, 91/90, 96/95 | ||
Mapping: {{mapping| 12 19 28 0 8 78 49 51 | 0 0 0 1 1 -1 0 0 }} | |||
Optimal tunings: | |||
* CTE: ~18/17 = 100.000, ~7/4 = 961.255 (~64/63 = 38.745) | |||
* POTE: ~18/17 = 100.000, ~7/4 = 961.920 (~64/63 = 38.080) | |||
Optimal | {{Optimal ET sequence|legend=0| 12, 24, 36, 60c }} | ||
Badness: 0.020939 | Badness (Smith): 0.020939 | ||
== Duodecim == | == Duodecim == | ||
[[Subgroup]]: 2.3.5.7.11 | |||
[[Comma list]]: 36/35, 50/49, 64/63 | |||
{{Mapping|legend=1| 12 19 28 34 0 | 0 0 0 0 1 }} | |||
: mapping genereators: ~16/15, ~11 | |||
[[POTE | [[Optimal tuning]]s: | ||
* [[CTE]]: ~16/15 = 1\12, ~11/8 = 551.318 (~33/32 = 48.682) | |||
: [[error map]]: {{val| 0.000 -1.955 +13.686 +31.174 0.000 }} | |||
* [[POTE]]: ~16/15 = 1\12, ~11/8 = 565.023 (~55/54 = 34.977) | |||
: error map: {{val| 0.000 -1.955 +13.686 +31.174 +13.705 }} | |||
{{ | {{Optimal ET sequence|legend=1| 12, 24d, 36d }} | ||
[[Badness]]: 0.030536 | [[Badness]] (Smith): 0.030536 | ||
== Hours == | == Hours == | ||
The hours temperament has a period of 1/24 octave and tempers out the cataharry comma (19683/19600) and the mirwomo comma (33075/32768). The name | The hours temperament has a period of 1/24 octave and tempers out the [[cataharry comma]] (19683/19600) and the mirwomo comma (33075/32768). The name ''hours'' was named for the reason that the period is 1/24 octave and there are 24 hours per day. | ||
Subgroup: 2.3.5.7 | [[Subgroup]]: 2.3.5.7 | ||
[[Comma list]]: 19683/19600, 33075/32768 | [[Comma list]]: 19683/19600, 33075/32768 | ||
{{Mapping|legend=1| 24 38 0 123 | 0 0 1 -1 }} | |||
: mapping generators: ~36/35, ~5 | |||
[[POTE | [[Optimal tuning]]s: | ||
* [[CTE]]: ~36/35 = 50.000, ~5/4 = 384.226 (~81/80 = 15.774) | |||
: [[error map]]: {{val| 0.000 -1.955 -2.088 -3.052 }} | |||
* [[POTE]]: ~36/35 = 50.000, ~5/4 = 384.033 (~81/80 = 15.967) | |||
: error map: {{val| 0.000 -1.955 -2.280 -2.859 }} | |||
{{ | {{Optimal ET sequence|legend=1| 24, 48, 72, 312bd, 384bcdd, 456bcdd, 528bcdd, 600bccdd }} | ||
[[Badness]]: 0.116091 | [[Badness]] (Smith): 0.116091 | ||
=== 11-limit === | === 11-limit === | ||
Line 266: | Line 326: | ||
Comma list: 243/242, 385/384, 9801/9800 | Comma list: 243/242, 385/384, 9801/9800 | ||
Mapping: | Mapping: {{mapping| 24 38 0 123 83 | 0 0 1 -1 0 }} | ||
POTE | Optimal tunings: | ||
* CTE: ~36/35 = 50.000, ~5/4 = 384.226 (~121/120 = 15.774) | |||
* POTE: ~36/35 = 50.000, ~5/4 = 384.054 (~121/120 = 15.946) | |||
Optimal | {{Optimal ET sequence|legend=1| 24, 48, 72, 312bd, 384bcdd, 456bcdde, 528bcdde }} | ||
Badness: 0.036248 | Badness (Smith): 0.036248 | ||
=== 13-limit === | === 13-limit === | ||
Line 279: | Line 341: | ||
Comma list: 243/242, 351/350, 364/363, 385/384 | Comma list: 243/242, 351/350, 364/363, 385/384 | ||
Mapping: | Mapping: {{mapping| 24 38 0 123 83 33 | 0 0 1 -1 0 1 }} | ||
Optimal tunings: | |||
* CTE: ~36/35 = 50.000, ~5/4 = 385.420 (~121/120 = 14.580) | |||
* POTE: ~36/35 = 50.000, ~5/4 = 384.652 (~121/120 = 15.348) | |||
{{Optimal ET sequence|legend=1| 24, 48f, 72, 168df, 240dff }} | |||
Badness (Smith): 0.026931 | |||
== Gamelstearn == | |||
The gamelstearn temperament has a period of 1/36 octave and tempers out the [[gamelisma]] (1029/1024) and the [[stearnsma]] (118098/117649). | |||
It used to be named "decades". | |||
Subgroup: 2.3.5.7 | [[Subgroup]]: 2.3.5.7 | ||
[[Comma list]]: 1029/1024, 118098/117649 | [[Comma list]]: 1029/1024, 118098/117649 | ||
{{Mapping|legend=1| 36 57 0 101 | 0 0 1 0 }} | |||
: mapping generators: ~49/48, ~5 | |||
[[POTE | [[Optimal tuning]]s: | ||
* [[CTE]]: ~49/48 = 33.333, ~5/4 = 386.314 (~81/80 = 13.686) | |||
: [[error map]]: {{val| 0.000 -1.955 0.000 -2.159 }} | |||
* [[POTE]]: ~49/48 = 33.333, ~5/4 = 384.764 (~81/80 = 15.236) | |||
: error map: {{val| 0.000 -1.955 -1.549 -2.159 }} | |||
{{ | {{Optimal ET sequence|legend=1| 36, 72, 252, 324bd, 396bd }} | ||
[[Badness]]: 0.108016 | [[Badness]] (Smith): 0.108016 | ||
=== 11-limit === | === 11-limit === | ||
Line 309: | Line 379: | ||
Comma list: 540/539, 1029/1024, 4000/3993 | Comma list: 540/539, 1029/1024, 4000/3993 | ||
Mapping: | Mapping: {{mapping| 36 57 0 101 41 | 0 0 1 0 1 }} | ||
POTE | Optimal tunings: | ||
* CTE: ~49/48 = 33.333, ~5/4 = 385.797 (~81/80 = 14.203) | |||
* POTE: ~49/48 = 33.333, ~5/4 = 385.150 (~81/80 = 14.850) | |||
Optimal | {{Optimal ET sequence|legend=1| 36, 72, 396bd, 468bcd, 540bcd, 612bccdd, 684bbccdd, 756bbccdd }} | ||
Badness: 0.043088 | Badness (Smith): 0.043088 | ||
== Omicronbeta == | == Omicronbeta == | ||
Subgroup: 2.3.5.7.11.13 | [[Subgroup]]: 2.3.5.7.11.13 | ||
[[Comma list]]: 225/224, 243/242, 385/384, 4000/3993 | |||
{{Mapping|legend=1| 72 114 167 202 249 0 | 0 0 0 0 0 1 }} | |||
: mapping generators: ~100/99, ~13 | |||
[[POTE | [[Optimal tuning]]s: | ||
* [[CTE]]: ~100/99 = 16.667, ~13/8 = 840.528 (~325/324 = 7.194) | |||
: [[error map]]: {{val| 0.000 -1.955 -2.980 -2.159 -1.318 0.000 }} | |||
* [[POTE]]: ~100/99 = 16.667, ~13/8 = 837.814 (~364/363 = 4.481) | |||
: error map: {{val| 0.000 -1.955 -2.980 -2.159 -1.318 -2.713 }} | |||
{{ | {{Optimal ET sequence|legend=1| 72, 144, 216c, 288cdf }} | ||
[[Badness]]: 0.029956 | [[Badness]] (Smith): 0.029956 | ||
[[Category:Temperament families]] | [[Category:Temperament families]] | ||
[[Category: | [[Category:Pages with mostly numerical content]] | ||
[[Category:Compton family| ]] <!-- main article --> | [[Category:Compton family| ]] <!-- main article --> | ||
[[Category:Compton| ]] <!-- key article --> | |||
[[Category:Rank 2]] | [[Category:Rank 2]] |