64/39
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| Ratio | 64/39 |
| Factorization | 26 × 3-1 × 13-1 |
| Monzo | [6 -1 0 0 0 -1⟩ |
| Size in cents | 857.51734¢ |
| Names | greater tridecimal neutral sixth, octave-reduced 39th subharmonic |
| Color name | 3u6, thu 6th |
| FJS name | [math]\text{M6}_{13}[/math] |
| Special properties | reduced, reduced subharmonic |
| Tenney height (log2 nd) | 11.2854 |
| Weil height (log2 max(n, d)) | 12 |
| Wilson height (sopfr (nd)) | 28 |
| Harmonic entropy (Shannon, [math]\sqrt{nd}[/math]) |
~4.26101 bits |
[sound info] | |
| open this interval in xen-calc | |
64/39, the (greater) tridecimal neutral sixth, is the utonal combination of primes 13 and 3, octave-reduced. It is the inverse of 39/32, the lesser tridecimal neutral third.
64/39 is a fraction of a cent away from the neutral third found in 7edo and its supersets.
See also
- 39/32 – its octave complement
- 13/8 – the lesser tridecimal neutral sixth
- Gallery of just intervals