1216/1215
Interval information |
Eratosthenes' comma
reduced
1216/1215, the password comma or Eratosthenes' comma is a 19-limit unnoticeable comma. It is the difference between 19/15 and 81/64, 19/18 and 135/128, or 20/19 and 256/243.
It is tempered out in edos including 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.