89edo: Difference between revisions
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Revision as of 01:15, 9 September 2020
89edo divides the octave into 89 steps of size 13.48 cents each, and tempers out the commas 126/125, 1728/1715, 32805/32768, 2401/2400, 176/175, 243/242, 441/440 and 540/539. It is an especially good tuning for myna temperament, both in the 7-limit, tempering out 126/125 and 1728/1715, and in the 11-limit, where 176/175 is tempered out also. It is likewise a good tuning for the rank three temperament thrush, tempering out 126/125 and 176/175.
89 has a fifth less than a cent flat and a major third less than five cents sharp, with a 7 two cents sharp and an 11 1.5 cents sharp. It thus delivers reasonably good 11-limit harmony and very good no-fives harmony along with the very useful approximations represented by its commas.
89edo is the 24th prime edo, and the 11th in the Fibonacci sequence, which means its 55th step approximates logarithmic phi (i.e. (phi-1)*1200 cents) within a fraction of a cent.