Synchronized music

This might be difficult to explain so bear with me. In 1997 The Flaming Lips released an album titled Zaireeka, which consists of four discs. Each disc has eight songs. The songs on each disc correspond with each other in such a way that if you play all four discs simultaneously, the result is a harmonious, synchronized piece of music. You don't have to play all four discs, you can play any combination you want to get different effects.

My idea would involve more than one artist, and it could be a new form of collaboration. Let's say you get two or three or four or more artists together to make a few songs in such a way that each song stands alone on it's own or could be played simultaneously to get a mash-up like effect. It would be even cooler if the artists didn't tell anyone about this then like several months later say "Oh by the way, check out what happens when you play our song at the exact same time as this Radiohead song and this MF Doom track and this Miley Cyrus song." Heads would explode.