Bidic comma: Difference between revisions

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Added page for the bidic comma
 
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Etymology: Added a year for comma name given
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== Etymology ==
== Etymology ==
The name was given by [[User:Tristanbay|Tristan Bay]] as a reference to [[Diaschismic family#Bidia|bidia]] temperament having the tuning quirks described above as a result of this comma being tempered out.
The name was given by [[User:Tristanbay|Tristan Bay]] in 2025 as a reference to [[Diaschismic family#Bidia|bidia]] temperament having the tuning quirks described above as a result of this comma being tempered out.

Revision as of 07:35, 27 November 2025

Interval information
Ratio 327680/321489
Factorization 216 × 3-8 × 5 × 7-2
Monzo [16 -8 1 -2
Size in cents 33.02189¢
Name bidic comma
Color name saruruyo unison, srry1, saruruyo comma
FJS name [math]\displaystyle{ \text{P1}^{5}_{7,7} }[/math]
Special properties reduced
Tenney norm (log2 nd) 36.6163
Weil norm (log2 max(n, d)) 36.6439
Wilson norm (sopfr(nd)) 75
Comma size medium
Open this interval in xen-calc

327680/321489, the bidic comma, is a 7-limit comma measuring about 33 cents and is the difference between a stack of 2 64/63s and a single 81/80. Tempering it out generally means that 64/63 is half the size of 81/80 and that 5120/5103 (the argent comma) is mapped as a negative interval.

Etymology

The name was given by Tristan Bay in 2025 as a reference to bidia temperament having the tuning quirks described above as a result of this comma being tempered out.