250/243: Difference between revisions
Jump to navigation
Jump to search
added fact about 250/243 being a chromium period and proposed a new name |
De-bold the neologism. The original names are pretty established and not subject to changes. Section into "temperaments" and "approximation" |
||
| Line 10: | Line 10: | ||
| Comma = yes | | Comma = yes | ||
}} | }} | ||
'''250/243''' is known as the '''porcupine comma''' or the '''maximal diesis'''. Measuring about 49{{cent}}, it is a [[medium comma]]. It is the amount by which two [[10/9|minor whole tones]] exceed a minor third, that is, (10/9)<sup>2</sup>/(6/5). | |||
== Temperaments == | |||
Tempering it out leads to the [[5-limit]] [[porcupine]] temperament. See [[porcupine family]] for the family of rank-2 temperaments where it is tempered out. | |||
== | == Approximation == | ||
If we do not temper out this interval and instead use it as an identity of some sort, it serves as the period in the [[chromium]] temperament, where it is mapped to 1/24th of the octave. Thus [[Eliora]] proposes the name ''chromium quartertone''. | |||
[[Category:Porcupine]] | [[Category:Porcupine]] | ||
Revision as of 02:24, 6 November 2022
| Interval information |
maximal diesis
250/243 is known as the porcupine comma or the maximal diesis. Measuring about 49 ¢, it is a medium comma. It is the amount by which two minor whole tones exceed a minor third, that is, (10/9)2/(6/5).
Temperaments
Tempering it out leads to the 5-limit porcupine temperament. See porcupine family for the family of rank-2 temperaments where it is tempered out.
Approximation
If we do not temper out this interval and instead use it as an identity of some sort, it serves as the period in the chromium temperament, where it is mapped to 1/24th of the octave. Thus Eliora proposes the name chromium quartertone.