129/128
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Ratio | 129/128 |
Subgroup monzo | 2.3.43 [-7 1 1⟩ |
Size in cents | 13.472707¢ |
Name | 43-limit comma (HEJI) |
Color name | 43o1, fotho unison |
FJS name | [math]\text{P1}^{43}[/math] |
Special properties | superparticular, reduced, reduced harmonic |
Tenney height (log_{2} nd) | 14.0112 |
Weil height (log_{2} max(n, d)) | 14.0225 |
Wilson height (sopfr (nd)) | 60 |
Harmonic entropy (Shannon, [math]\sqrt{nd}[/math]) |
~2.68981 bits |
Comma size | small |
open this interval in xen-calc |
129/128, or the 43-limit Johnston comma (HEJI), is a 2.3.43 subgroup comma. It is the amount by which 43/32 (the 43rd harmonic) exceeds the perfect fourth (4/3). It is significant in Helmholtz-Ellis notation as the formal comma to translate a Pythagorean interval to a nearby quadragesimotertial interval.