If the chromatic semitone is two-thirds the size of the diatonic semitone, i.e. C = (2/3)D, the result is 31 equal, with two steps for the chromatic semitone, three steps for the diatonic semitone, and five steps for the tone, where 5T + 2S = 25 + 6 = 31 steps. The resulting 12-tone system closely approximates the historically important 1/4 comma meantone.
