129/128

Interval information

Ratio	129/128
Subgroup monzo	2.3.43 [-7 1 1⟩
Size in cents	13.47271¢
Name	43-limit comma (HEJI)
Color name	43o1, fotho unison
FJS name	[math]\displaystyle{ \text{P1}^{43} }[/math]
Special properties	superparticular, reduced, reduced harmonic
Tenney height (log2 nd)	14.0112
Weil height (log2 max(n, d))	14.0225
Wilson height (sopfr(nd))	60
Comma size	small
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129/128, or the 43-limit Johnston comma (HEJI), is a 2.3.43 subgroup comma. It is the amount by which the octave-reduced 43rd harmonic 43/32 exceeds the perfect fourth (4/3). It is significant in the Functional Just System and Helmholtz-Ellis notation as the formal comma to translate a Pythagorean interval to a nearby quadragesimotertial interval.