Author: wrowand
Date: 2013-12-12 18:58
Robin:
I believe 50 cents is a quarter tone. 100 cents is a half step.
Jonathan:
Concerning the 31.17 cents difference between a just minor seventh and an equal tempered minor seventh:
As a harmonic interval, I think it's likely that there will be some other chord tone that you can tune to rather than trying to tune the minor seventh.
I think it's more common to see the frequency ratio of that interval as 16/9 (a fourth above the fourth, -3.9 cents from equal-tempered) or 9/5 (a minor third above the fifth, +17 cents from equal tempered), both of which are closer to the equal-tempered interval than the 7/4 ratio in your screenshot.
Best regards,
Woody
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