129/128: Difference between revisions

+significance in FJS and misc. rework
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{{Infobox Interval
{{Infobox Interval
| Ratio = 129/128
| Ratio = 129/128
| Name = 43-limit comma (HEJI)
| Name = Magikarp comma, 43rd-partial chroma, 43-limit Johnston comma
| 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 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.
'''129/128''', the '''Magikarp comma''' 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)]].
 
This interval is the 43rd-partial chroma (43-limit formal comma) used to express 43-limit intervals in the [[Functional Just System]] and [[Helmholtz-Ellis notation]], as well as extended [[Ben Johnston's notation]]. It is significant to translate a Pythagorean interval to a nearby quadragesimotertial interval.
 
== Etymology ==
The name ''Magikarp comma'' was named by [[User:Xenllium|Xenllium]] in 2025. It refers to [[wikipedia:Magikarp and Gyarados|Magikarp]] (National Pokédex number #0129), which was in turn named after a fictional character in the ''[[wikipedia:Pokémon|Pokémon]]'' franchise (''Pokémon'' species). Before that, this interval was known as 43rd-partial chroma or 43-limit Johnston comma.
 
== Temperaments ==
Tempering out this comma in the 43-limit leads to the '''magikarp temperament'''. In the 2.3.43 subgroup, it can be viewed as a diatonic-based temperament in which the perfect fifth represents both [[3/2]] and [[64/43]] (43rd subharmonic).
 
== See also ==
* [[Small comma]]
* [[List of superparticular intervals]]


[[Category:Commas named after composers]]
[[Category:Commas named after composers]]
[[Category:Commas named after music theorists]]
[[Category:Commas named after music theorists]]
[[Category:Commas named after fictional characters]]