Pythagorean family: Difference between revisions

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The Pythagorean family tempers out the Pythagorean comma, 531441/524288 = {{monzo| -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 12et, two cents flat, the tuning of the larger primes is not so constrained, and the point of these temperaments is to improve on it.


The Pythagorean family tempers out the Pythagorean comma, 531441/524288 = |-19 12>, and hence the fifths form a closed 12-note circle of fifths, identical to [[12edo|12edo]]. While the tuning of the fifth will be that of 12et, two cents flat, the tuning of the larger primes is not so constrained, and the point of these temperaments is to improve on it.
= Pythagorean =


[[POTE_tuning|POTE generator]]: ~5/4 = 384.884 (15.116)
Comma list: 531441/524288


Map: [<12 19 0|, <0 0 1|]
[[POTE generator]]: ~5/4 = 384.884 or ~81/80 = 15.116


EDOs: [[12edo|12]], [[72edo|72]], [[84edo|84]], 156, 240, 396b
Mapping: [{{val| 12 19 0 }}, {{val| 0 0 1 }}


=Compton temperament=
{{Val list|legend=1| 12, 72, 84, 156, 240, 396b }}
In terms of the normal list, compton adds 413343/409600 = |-14 10 -2 1> to the Pythagorean comma; however it can also be characterized by saying it adds 225/224. Compton, however, does not need to be used as a 7-limit temperament; in the 5-limit it becomes the rank two 5-limit temperament tempering out the Pythagorean comma. In terms of equal temperaments, it is the 12&72 temperament, and [[72edo]], [[84edo]] or [[240edo]] make for good tunings. Possible generators are 21/20, 10/9, the secor, 6/5, 5/4, 7/5 and most importantly, 81/80.  
 
= Compton =
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. Compton, however, does not need to be used as a 7-limit temperament; in the 5-limit it becomes the rank two 5-limit temperament tempering out the Pythagorean comma. In terms of equal temperaments, it is the 12&72 temperament, and [[72edo]], [[84edo]] or [[240edo]] make for good tunings. Possible generators are 21/20, 10/9, the secor, 6/5, 5/4, 7/5 and most importantly, 81/80.  


In the either the 5 or 7-limit, [[240edo]] is an excellent tuning, with 81/80 coming in at 15 cents exactly. 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 the either the 5 or 7-limit, [[240edo]] is an excellent tuning, with 81/80 coming in at 15 cents exactly. 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.
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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 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.


Commas: 225/224, 250047/250000
Comma list: 225/224, 250047/250000


[[POTE_tuning|POTE generator]]: ~5/4 = 383.775 (16.225)
[[POTE generator]]: ~5/4 = 383.775 or ~81/80 = 16.225


Map: [<12 19 0 -22|, <0 0 1 2|]
Mapping: [{{val| 12 19 0 -22 }}, {{val| 0 0 1 2 }}]


EDOs: 12, [[60edo|60]], 72, 228, 300c, 372bc, 444bc
{{Val list|legend=1| 12, 60, 72, 228, 300c, 372bc, 444bc }}


==11-limit==
== 11-limit ==
Commas: 225/224, 441/440, 4375/4356
Comma list: 225/224, 441/440, 4375/4356


[[POTE_tuning|POTE generator]]: ~5/4 = 383.266 (16.734)
[[POTE generator]]: ~5/4 = 383.266 or ~81/80 = 16.734


Map: [<12 19 0 -22 -42|, <0 0 1 2 3|]
Mapping: [{{val|12 19 0 -22 -42 }}, {{val| 0 0 1 2 3 }}]


EDOs: 12, 60e, 72
{{Val list|legend=1| 12, 60e, 72 }}


==13-limit==
=== 13-limit ===
Commas: 225/224, 441/440, 351/350, 364/363
Comma list: 225/224, 441/440, 351/350, 364/363


POTE generator: ~5/4 = 383.963 (16.037)
POTE generator: ~5/4 = 383.963 or ~81/80 = 16.037


Map: [<12 19 0 -22 -42 -67|, <0 0 1 2 3 4|]
Mapping: [{{val| 12 19 0 -22 -42 -67 }}, {{val| 0 0 1 2 3 4 }}]


EDOs: 72, 228f, 300cf
{{Val list|legend=1|  72, 228f, 300cf }}


Badness: 0.0219
Badness: 0.0219


==Comptone==
=== Comptone ===
Commas: 225/224, 441/440, 325/324, 1001/1000
Comma list: 225/224, 441/440, 325/324, 1001/1000


POTE generator: ~5/4 = 382.612 (17.388)
POTE generator: ~5/4 = 382.612 or ~81/80 = 17.388


Map: [<12 19 0 -22 -42 100|, <0 0 1 2 3 -2|]
Mapping: [{{val| 12 19 0 -22 -42 100 }}, {{val| 0 0 1 2 3 -2 }}]


EDOs: 12, 60e, 72, 204cdef, 276cdef
{{Val list|legend=1| 12, 60e, 72, 204cdef, 276cdef }}


Badness: 0.0251
Badness: 0.0251


=Catler temperament=
= 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 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 12&24 temperament. [[36edo]] or [[48edo]] are possible tunings. Possible generators are 36/35, 21/20, 15/14, 8/7, 7/6, 6/5, 9/7, 7/5, and most importantly, 64/63.   
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 12&24 temperament. [[36edo]] or [[48edo]] are possible tunings. Possible generators are 36/35, 21/20, 15/14, 8/7, 7/6, 6/5, 9/7, 7/5, and most importantly, 64/63.   


Commas: 81/80, 128/125
Comma list: 81/80, 128/125


[[POTE_tuning|POTE generator]]: 26.790
[[POTE generator]]: ~64/63 = 26.790


Map: [<12 19 28 0|, <0 0 0 1|]
Mapping: [{{val| 12 19 28 0 }}, {{val| 0 0 0 1 }}]


EDOs: 12, [[36edo|36]], [[48edo|48]], 132, 180
{{Val list|legend=1| 12, 36, 48, 132, 180 }}


==11-limit==
==11-limit==