Though we hadn't previously considered this particular gameplay option, Reddit user Apterygiformes has rigged up a MIDI keyboard to send commands to his computer that are read as keystrokes in WoW. It doesn't look terribly practical -- Apterygiformes says the project is just for fun -- but we have to admit, the piano accompaniment to this lowbie hunter's gameplay is certainly interesting... though we're guessing it took some setup to give it any kind of musical quality.
But it leaves us wondering what other WoW classes might sound like when played in this manner. With different skills and cooldowns, wouldn't each class would have its own musical soundtrack to enjoy? Without any musical skill of our own, we'll have to content ourselves with seeing if Apterygiformes continues this particular experiment.