Rarity comma
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Interval information |
reduced harmonic
(Shannon, [math]\displaystyle{ \sqrt{nd} }[/math])
Rarity comma is a 5-limit interval, which when tempered out produces the rarity temperament.
Temperaments
Tempering it out produces rarity temperament in the 5-limit. On it's own it is quite a large interval, being the size of a neutral second, however each individual generator step of the temperament is flattened by a small amount which is evenly spread out in the scale.
Etymology
Rarity comma was named by Eliora as a pronounceable shortening of "radian-thirteen", taken from comma's monzo. A radian is 57 degrees and 17 arcminutes, and the final number is 13, and thus "radian-thirteen" was collapsed to "rarity".