129/128: Difference between revisions
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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 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. | '''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. | ||
[[Category:Commas named after composers]] | |||
[[Category:Commas named after music theorists]] | |||
Revision as of 01:38, 16 November 2024
| Interval information |
reduced,
reduced harmonic
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.