26-comma: Difference between revisions

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{{Infobox Interval
{{Infobox Interval
| Name = 26-comma
| Name = 26-comma, Pythagorean inverse triple-diminished second
| Ratio = 2541865828329/2199023255552
| Ratio = 2541865828329/2199023255552
| Color name = Wa-26, L<sup>4</sup>w-2
| Color name = Wa-26, L<sup>4</sup>w-2
| Comma = technically
| Comma = true
}}
}}
The '''26-comma''' is a [[3-limit]] [[semifourth]] that acts as a comma in certain temperaments. It is the difference between 26 perfect fifths and 15 octaves, as well as being two [[Pythagorean commas]] sharp of [[9/8]].
The '''26-comma''' is a [[3-limit]] [[semifourth]] that acts as a comma in certain temperaments. It is the difference between 26 perfect fifths and 15 octaves, as well as being two [[Pythagorean comma|Pythagorean commas]] sharp of [[9/8]].  


While it is exceptionally large for a comma (two of them make a near-perfect fourth, off by the small [[53-comma]]), it is tempered out in [[26edo]], because of that temperament's narrow fifths.
While it is exceptionally large for a comma (two of them make a near-perfect fourth, off by the small [[53-comma]]), it is tempered out in [[26edo]], because of that temperament's narrow fifths.


As an untempered interval, it approximates intervals like [[15/13]], and is the simplest Pythagorean interval of this size. As such, it could also be known as '''the''' Pythagorean semifourth.
Used as an interval in its own right, it is the '''Pythagorean inverse triple-diminished second'''. It approximates intervals like [[15/13]], and is the simplest Pythagorean interval of this size. As such, it could also be known as the ''Pythagorean semifourth''.
 
[[Category:Commas named systematically]][[Category:Commas named after their interval size]]