Canou family: Difference between revisions

Rename since none of the low accuracy extensions should be canonical
Semicanou: +new canonical 13-limit extension
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== Semicanou ==
== Semicanou ==


Semicanou adds 9801/9800, the kalisma, to the comma list, and may be described as 80 & 94 & 118. It splits the octave into two equal parts, each representing 99/70. Note that 99/70 = (81/70)×(11/9), this extension is more than natural.  
Semicanou adds 9801/9800, the kalisma, to the comma list, and may be described as 80 & 94 & 118. It splits the octave into two equal parts, each representing ~99/70. Note that 99/70 = (81/70)(11/9), this extension is more than natural.  


The other comma necessary to define it is 14641/14580, the [[semicanousma]], which is the difference between [[121/120]] and [[243/242]]. By flattening the 11th harmonic by one cent, it identifies [[20/11]] by three [[11/9]]'s stacked, so an octave can be divided into 11/9-11/9-11/9-11/10.  
The other comma necessary to define it is 14641/14580, the [[semicanousma]], which is the difference between [[121/120]] and [[243/242]]. By flattening the 11th harmonic by one cent, it identifies [[20/11]] by three [[11/9]]'s stacked, so an octave can be divided into 11/9-11/9-11/9-11/10.  
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Subgroup: 2.3.5.7.11
Subgroup: 2.3.5.7.11


Comma list: 9801/9800, 14641/14580
[[Comma list]]: 9801/9800, 14641/14580


POTE generators: ~3/2 = 702.3850, ~81/70 = 254.6168 or ~11/9 = 345.3832
[[POTE generator]]s: ~3/2 = 702.3850, ~81/70 = 254.6168 or ~11/9 = 345.3832


Mapping: [{{val| 2 0 0 -2 1 }}, {{val| 0 1 2 2 2 }}, {{val| 0 0 4 -3 1 }}]
[[Mapping]]: [{{val| 2 0 0 -2 1 }}, {{val| 0 1 2 2 2 }}, {{val| 0 0 4 -3 1 }}]


{{Val list|legend=1| 80, 94, 118, 198, 212, 292, 330e, 410 }}
{{Val list|legend=1| 80, 94, 118, 198, 212, 292, 330e, 410 }}


Badness: 2.197 × 10<sup>-3</sup>
[[Badness]]: 2.197 × 10<sup>-3</sup>
 
=== 13-limit ===
Subgroup: 2.3.5.7.11.13
 
Comma list: 1716/1715, 2080/2079, 14641/14580
 
Mapping: [{{val| 2 0 0 -2 1 -11 }}, {{val| 0 1 2 2 2 5 }}, {{val| 0 0 -4 3 -1 6 }}]
 
POTE generators: ~3/2 = 702.5046, ~81/70 = 254.6501 or ~11/9 = 345.3499
 
Vals: {{Val list| 80f, 94, 118f, 198, 410 }}
 
Badness: 2.974 × 10<sup>-3</sup>


=== Semicanoumint ===
=== Semicanoumint ===
This extension was named ''semicanou'' in the earlier materials. It adds [[352/351]], the minthma, to the comma list. It is a natural extension to the 13-limit.  
This extension was named ''semicanou'' in the earlier materials. It adds [[352/351]], the minthma, to the comma list, so that the flat ~11/9 simultaneously represents ~39/32.  


Subgroup: 2.3.5.7.11.13
Subgroup: 2.3.5.7.11.13