Ric, For EB M3, M6 (as you wrote...), this formula gives relative P4, P5, m3 sizes too. M6=ABS({4(M3)-[(5+5)*P1]}/-3) P4=M6-M3 P5=2(M3)-M6 m3=2(P1)-M6 But it still doesn't give adequate generators for a normal temperament; however, EB M3, m6 can only give 3 sizes of M3s. Probably I'm looking at this the wrong way, anyhow. Perhaps I could forward your query to the Tuning list. Clark
This PTG archive page provided courtesy of Moy Piano Service, LLC