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{{Infobox Interval | {{Infobox Interval | ||
| Name = marveltwin comma | | Name = marveltwin comma | ||
| Color name = | | Color name = 3oyy1, thoyoyo 1sn,<br>Thoyoyo comma | ||
| Comma = yes | |||
| | |||
}} | }} | ||
The '''marveltwin comma''', '''325/324''', is a [[13-limit]] (also 2.3.5.13 [[subgroup]]) [[comma]] measuring about 5.3{{cent}}. Its significance is in that it marks the difference between [[16/13]] and a stack of two [[10/9]]'s, or between [[13/9]] and a stack of two [[6/5]]'s. It can also be expressed as ([[25/24]])/([[27/26]]) and ([[100/99]])/([[144/143]]), among other expressions. | |||
Being a [[triangle-particular|triangle superparticular]], it factors neatly into ([[625/624]])([[676/675]]). Other factorizations are ([[385/384]])([[2080/2079]]), ([[364/363]])([[3025/3024]]), ([[352/351]])([[4225/4224]]), and ([[351/350]])([[4375/4374]]). In the 17-limit it additionally factors into ([[595/594]])([[715/714]]). | |||
== Temperaments == | |||
Tempering out this comma leads to the rank-5 [[Marveltwin|marveltwin temperament]], which identifies [[16/13]] by two [[10/9]]'s stacked and enables [[marveltwin chords]]. The most significant further temperament is to temper out 625/624 and/or 676/675, equating 26/25 with 25/24~27/26. This in the 2.3.5.13 [[subgroup]] is the rank-2 [[cata]] temperament. | |||
== See also == | == See also == | ||
* [[Marveltwin]] | * [[Marveltwin]] | ||
* [[List of superparticular intervals]] | * [[List of superparticular intervals]] | ||
[[Category:Marveltwin]] | [[Category:Marveltwin]] | ||
[[Category: | [[Category:Commas with unknown etymology]] |