An easy achievement for you to earn. This is how it is done.
-Go into the options menu.
-Select stage music settings.
-Change the stage's original music piece with another piece.
-Exit out of the options menu.
-Achievement should unlock if done correctly.
Once you earn the achievement, you can go back into the music settings and turn all the music settings back to default, which is what I immediately did after I followed the instructions. Very simple, very easy to do. It's one of the easiest achievements in the game, so no problem!