Testing

The blackwood-dicot-semaphore equivalence continuum is a continuum of 7-limit rank-3 temperaments describing the set of all 7-limit rank-3 temperaments supported by 10edo. Any rank-2 temperament supported by 10edo can thus be represented by a line between two points in this continuum.

All temperaments in the continuum satisfy (25/24)p(49/48)q ~ 256/243, equating a stack of dicot commas (25/24) and semaphore commas (49/48) with the blackwood comma (256/243).

The blackwood comma is the characteristic 3-limit comma tempered out in 10edo.

Selected temperaments with integer p and q
p q Temperament Comma
Ratio Monzo
0 0 Blackwood 256/243 [8 -5 0 0
0 1 Archytas (squared) 4096/3969 [12 -4 0 -2
0 2 Buzzard 65536/64827 [16 -3 0 -4
0 3 Slendric (squared) 1058841/1048576 [-20 2 0 6
0 Semaphore 49/48 [-4 -1 0 2
1 0 Srutal 2048/2025 [11 -4 -2 0
1 1 Mirwomo 33075/32768 [15 -3 -2 -2
1 Jubilic 50/49 [1 0 2 -2
2 0 Negri 16875/16384 [-14 3 4 0
0 Dicot 25/24 [-3 -1 2 0
1 Jubilic 50/49 [1 0 2 -2
2 Breedsmic 2401/2400 [-5 -1 -2 4