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Interval information
Ratio 135/128
Monzo [-7 3 1
Size in cents 92.17872
Name(s) pelogic comma,
major limma,
major chroma
Color name Ly1, layo unison,
Layobi comma
FJS name A15

[sound info]
open this interval in xen-calc

The 5-limit interval 135/128, about 92.2 cents in size, is called the pelogic comma, major limma or major chroma. It is a syntonic comma away from the pythagorean major semitone 2187/2048, and so is tuned justly in 1/7 comma meantone. Flattening by another syntonic comma reaches the even simpler 25/24.

As a comma it represents the difference between three perfect fourths and a just major third (plus an octave).

See also