I up the ante, what if you get a bard NPC to travel with you so he can learn the music make it learn by percent the music of said dungeon/duty depending on how well did you clear it (if it dies, well you will have to repeat, basically an escort mission, level caped.

then he gives you the "partitur" when he reach 100% and using other stuff you craft the "disc" for the jukebox.