I agree with the Organ/Phantom of the Opera bit, but I was trying to think of an instrument for Ganondorf that's more portable (unless he can summon his organ with magic).
Ok, you know how Pols Voice don't like sounds/music (that's why bombs, musical instruments, and your voice can stun it). What if there were more enemies affected by the music you played? I mean, if the Pied Piper can summon rats out of a village (in reality he convinced children to leave their houses...but I digress), why not Link? In
LA he had to get Marin to sing to the walrus to move his fat ass out of the way. Music can play a very intricate part in Zelda (it did a decent job in Spirit Tracks...I liked the Bell Puzzle in the Snow Temple). Like what if Link could play a song for animals to be summoned out of hiding (like a rat in a hole)? Or you're sneaking in a castle and you have to put the guards to sleep to sneak by. The ending of
ST (when all the Lokomos played their instruments) really reminded me of
LA when Link was in front of the Egg and all the instruments he had collected started playing the melody. It was a very cool moment.
-BGS
PS: yes, that video was pure gold