31/28
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| Ratio | 31/28 |
| Monzo | [-2 0 0 -1 0 0 0 0 0 0 1⟩ |
| Size in cents | 176.20966 |
| Name(s) | Tricesimoprimal whole tone, Tetracot whole tone |
| open this interval in xen-calc | |
31/28 is a mildly flat whole tone, 280/279 flat of 10/9 and 155/154 sharp of 11/10. It is an excellent generator for Tetracot temperament, as it is just 1/25th of a cent sharper than the POTE generator for 5-limit tetracot. Curiously, this is not the mapping used for the ultra high limit Stratosphere extension, suggesting there might be other unexplored high level extensions in this region.