21/20: Difference between revisions

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A small semitone, 21/20 may be found in 7-limit just intonation as, for example, the difference between 8/7 and 6/5, or between 5/3 and 7/4.
A small semitone of about 85 cents, 21/20 may be found in 7-limit just intonation as, for example, the difference between 8/7 and 6/5, or between 5/3 and 7/4.


[http://en.wikipedia.org/wiki/Septimal_chromatic_semitone http://en.wikipedia.org/wiki/Septimal_chromatic_semitone]
[http://en.wikipedia.org/wiki/Septimal_chromatic_semitone http://en.wikipedia.org/wiki/Septimal_chromatic_semitone]

Revision as of 18:21, 23 October 2018

Interval information
Ratio 21/20
Factorization 2-2 × 3 × 5-1 × 7
Monzo [-2 1 -1 1
Size in cents 84.46719¢
Names minor semitone,
large septimal chromatic semitone
Color name zg2, zogu 2nd
FJS name [math]\displaystyle{ \text{m2}^{7}_{5} }[/math]
Special properties superparticular,
reduced
Tenney height (log2 nd) 8.71425
Weil height (log2 max(n, d)) 8.78463
Wilson height (sopfr(nd)) 19

[sound info]
Open this interval in xen-calc

A small semitone of about 85 cents, 21/20 may be found in 7-limit just intonation as, for example, the difference between 8/7 and 6/5, or between 5/3 and 7/4.

http://en.wikipedia.org/wiki/Septimal_chromatic_semitone