129/128: Difference between revisions
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{{Infobox Interval | {{Infobox Interval | ||
|Ratio = 129/128 | | Ratio = 129/128 | ||
|Name = 43-limit comma (HEJI) | | Name = 43-limit comma (HEJI) | ||
|Color name = 43o1, fotho unison | | Color name = 43o1, fotho unison | ||
|Comma = yes | | Comma = yes | ||
}} | }} | ||
'''129/128''', or the '''43-limit Johnston comma (HEJI)''', is a 2.3.43 subgroup comma. It is the amount by which 43/32 | '''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 [[4/3|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. | ||
[[Category:Commas named after composers]] | [[Category:Commas named after composers]] | ||
[[Category:Commas named after music theorists]] | [[Category:Commas named after music theorists]] | ||
Revision as of 17:23, 28 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 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.