Screw Pythagoras! Interesting modwiggler thread on non-pythagorean tunings. One that leaps out is Robert Schneider’s logarithmic tuning has some interesting sounding beat frequencies; he made an album using the logarithmic tuning which has some interesting sounds. There are also interesting properties in “macrotonal” scales, such as the 7EDO used in some African and early Chinese musics and 9EDO scales used in Indonesian music.