here is a repost of sorts.... Cap'n Zhao mentions this way back in the archives with a link to it on the once wonderful but now non-functional site classicalconnection, so here is seminal minimalist La Monte Young's The Well-Tuned Piano, the 1988 Gramavision recording.
LA MONTE YOUNG: At the world premiere of The Well-Tuned Piano, the live world premiere in Rome in 1974, Pandit Pran Nath was there. And he said, "You literally transformed the traditional instrument of Europe before their eyes." Somehow, by tuning the piano in just intonation, it takes it back to the lyre of Orpheus and the harp of David which had to be tuned in a much simpler way, and it brings out some of those characteristics. The piano just depends on what you do with it. It's like everything else. Remember when electronic instruments came out and the Musician's Union said, "This is going to be a problem. Musicians are going to be out of work" and so forth. They weren't really. It just became another instrument. And what you do with electronics is what's important.
(need to download all to get the 5 cd's)