Oh, oh, oh I have this piece of music! The last time I was home, I went to an art gallery in which one whole room was just this piece of music on continuous repeat, with a speaker for every voice. They'd miked everyone separately so it was *incredible* - you could walk between the speakers and hear the individual who was singing the one particular harmony, or you could stand in the middle of the room and let it wash over you. It was transcendent.