I made a copy of this on cd back in 2004 to mess with the pitch controls on Sega Saturn's CD player mode. So it was going faster like this, but I shifted the pitch on the Sega Saturn to bring the music back to its normal pitch. You could also change the pitch to even lower and it sounded like giants singing instead of chipmunks.
lol this is original songs and he just level up the pitch and increase the speed, but i love it, it sounds like alvin and chipmunk singing this songs... sorry by the way about my english :D