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Interval information
Ratio 21/20
Monzo |-2 1 -1 1>
Size in cents 84.4672
Name(s) minor semitone,
large septimal chromatic semitone
Color name zg2, zogu 2nd

[sound info]

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.