Porcupine family: Difference between revisions

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Review & make undecimation a septimal porcupine extension as it seems it was never explicitly no-7
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Badness (Sintel): 0.303
Badness (Sintel): 0.303
==== Undecimation (no-7s) ====
Subgroup: 2.3.5.11.13
Comma list: 55/54, 100/99, 512/507
Subgroup-val mapping: {{mapping| 1 -1 -2 0 5 | 0 6 10 8 -3 }}
: mapping generators: ~2, ~88/65
Optimal tunings:
* WE: ~2 = 1199.4791{{c}}, ~88/65 = 517.9845{{c}}
* CWE: ~2 = 1200.0000{{c}}, ~88/65 = 518.1740{{c}}
{{Optimal ET sequence|legend=0| 7, 23bc, 30, 37, 44 }}
Badness (Sintel): 1.21


== Septimal porcupine ==
== Septimal porcupine ==
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Badness (Sintel): 1.08
Badness (Sintel): 1.08


===== Undecimation =====
==== Undecimation ====
This temperament is used by most patent edos that have septimal porcupine and tune 13 well.
This weak extension is used by most patent vals that support porcupine and tune 13 well.


Subgroup: 2.3.5.7.11.13
Subgroup: 2.3.5.7.11.13


Comma list: 55/54, 64/63, 100/99, 512/507
Comma list: 55/54, 64/63, 100/99, 169/168


Mapping: {{mapping| 1 5 8 -4 8 2| 0 -6 -10 12 -8 3 }}
Mapping: {{mapping| 1 -1 -2 8 0 5 | 0 6 10 -12 8 -3 }}
 
: mapping generators: ~2, ~35/26
mapping generators: ~2, ~52/35


Optimal tunings:
Optimal tunings:
* WE: ~2 = 1198.4569{{c}}, ~35/26 = 517.9375{{c}}
* CWE: ~2 = 1200.0000{{c}}, ~35/26 = 518.5822{{c}}


*WE: ~2 = 1198.457{{c}}, ~52/35 = 680.519{{c}}
{{Optimal ET sequence|legend=0| 7, 30, 37, 81bd }}
* CWE: ~2 = 1200.000{{c}}, ~52/35 = 681.418{{c}}
 
{{Optimal ET sequence|legend=0|7, 30, 37, 44}}


Badness (Sintel): 1.679
Badness (Sintel): 1.68


== Opossum ==
== Opossum ==