22/17
Interval information |
[sound info]
In 17-limit just intonation, 22/17 is the septendecimal supermajor third, measuring about 446.4¢. It is the mediant between 9/7 and 13/10, as it is (9+13)/(7+10).
Intervals around this size or a few cents smaller make good generators for sensi temperament.