684edo

684EDO is the equal division of the octave into 684 parts of 1.75439 cents each (dividing the steps of 171EDO into four). It is consistent to the 17-limit, tempering out 2401/2400, 3025/3024, 4225/4224, 4375/4374, and 32805/32768 in the 13-limit; 1089/1088, 1225/1224, 1701/1700, 2025/2023, 2058/2057, 2500/2499, 8624/8619, and 14875/14872 in the 17-limit.