20/19
| Interval information |
small undevicesimal limma
undevicesimal augmented unison
reduced
[sound info]
In 19-limit just intonation, 20/19 is the small undevicesimal semitone, measuring about 88.8¢ (almost exactly 1/3 of a subminor third of 7/6). Its octave complement is 19/10, the "undevicesimal diminished octave". It is very close to 2 steps out of 27edo, or 88.8889 cents.
The small comma (7/6)/(20/19)^3 = 48013/48000 is tempered out in 12, 41, 53, 68, 80, 94, 121, 161, 190, 202, 217, 229, 243, 270, 282, 311, 323, 364, 460, 472, 513, 525, 540, 581, 742, 783, 795, 1012, 1053, 1106, 1308, 1323, 1578, 1848, 1889, and 2320 EDOs, leading to a variety of temperaments in which three semitones make up a subminor third.
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 20/19 with Pythagorean limma and 19/18 with major limma respectively.
See also
- Gallery of just intervals
- 19/18 - greater undevicesimal semitone
- 21/20
- 88cET