Tritone

The tritone is the name of a musical interval that is made up of three whole tones, which in 12edo is 600 cents. In non-12 tunings, and particularly in JI, there are a number of different tritones which have subtly different flavors, such as 7/5 and 10/7. The temperament eliminating 50/49 is of particular interest in that it equates these two tritones, and provides a JI basis for the 12-EDO concept of the "tritone substitution."