I've done corruptions of Knuckles'Chaotix in RTC and have managed to corrupt music that was in the game.
Here is the corrupted version of Electoria music. It looks like it doesn't repeat when I listened to it for some time. A interesing thing is that I could incorporate sound effects (rings etc.) to one of the instruments. https://www.youtube.com/watch?v=WFIuRI4LFBQ