The problem you are raising is the one which separated Plato from Aristotle.
Plato said the form can and must exist above and beyond the matter.
Aristotle said the two were permanently entangled.
This is a very old division which you are trying to solve by seeing it in one instantiation -- music vs. sound.
You might consider reading about form and matter.
Of course, you could also see this as a tension between soul and body. You lament that music -- the soul -- is forced to become sound -- the body -- with all its limitations, defects, fallibilities. Pure music becomes sullied with sonic carnality. How terrible!
So, turn the tables! Revel in your body -- rejoice in flaws and carnality! Be dionysian and play the flute! Drink wine! YOLO, as the kids say.