I was interested in this a few years ago, and one of the sites I found back then was Xentonality: http://eceserv0.ece.wisc.edu/~sethares/xentone.html http://ec

I was interested in this a few years ago, and one of the sites I found back then was Xentonality: http://eceserv0.ece.wisc.edu/~sethares/xentone.html http://eceserv0.ece.wisc.edu/~sethares/xentone.html It includes music featuring some really intriguing concepts. For example, "Three Ears" isn't played in a fixed scale at all - instead the tuning is tweaked on the fly "for maximum consonance". The result is weirdly fascinating.