256/135
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| Ratio | 256/135 |
| Factorization | 28 × 3-3 × 5-1 |
| Monzo | [8 -3 -1⟩ |
| Size in cents | 1107.8213¢ |
| Name | ptolemaic diminished octave |
| Color name | sg8, sagu octave |
| FJS name | [math]\text{d8}_{5}[/math] |
| Special properties | reduced, reduced subharmonic |
| Tenney height (log2 nd) | 15.0768 |
| Weil height (log2 max(n, d)) | 16 |
| Wilson height (sopfr(nd)) | 30 |
| Harmonic entropy (Shannon, [math]\sqrt{nd}[/math]) |
~4.23773 bits |
| open this interval in xen-calc | |
The interval 256/135, the ptolemaic diminished octave is the interval formed by subtracting 135/128 from the octave, it differs from 243/128 by the schisma.