91/90
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| Ratio | 91/90 |
| Monzo | [-1 -2 -1 1 0 1⟩ |
| Size in cents | 19.12985 |
| Name(s) | biome comma, superleap comma |
| open this interval in xen-calc | |
The superparticular interval 91/90, the biome comma or superleap comma, is a small comma of about 19 cents.
For temperaments eliminating this comma, see also The Biosphere.