19/18

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Interval information
Ratio 19/18
Monzo |-1 -2 0 0 0 0 0 1>
Size in cents 93.60301
Name(s) greater undevicesimal semitone
greater undevicesimal limma
undevicesimal minor second
Color name 19o2, ino 2nd
270px
[sound info]

In 19-limit Just Intonation, 19/18 is the "greater undevicesimal semitone," measuring about 93.6¢. Its octave complement is 36/19, the "undevicesimal major seventh".

The small comma (39/35)/(19/18)^2 = 12636/12635 is tempered out in 53, 130, 140, 243, 270, 422, 513, 665, 742, 795, 935, 1178, 1065, 1205, 1308, 1395, 1448, 1578, 2000, 2190, 2243, 2460, 3125, 3178, 3395, and 4703 EDOs.

The password comma, (256/243)/(20/19) = (19/18)/(135/128) = 1216/1215 is tempered out in 12, 29, 41, 53, 65, 77, 87, 94, 99, 106, 111, 118, 130, 140, 152, 159, 183, 193, 205, 217, 270, 282, 311, 323, 364, 400, 422, 581, and 692 EDOs, leading to a variety of temperaments which identifies small undevicesimal semitone with Pythagorean limma and greater undevicesimal semitone with major limma respectively.

See also

  • 20/19 - small undevicesimal semitone