The way music is played. The sounds. Chord progressions. Beats. None of that is spiritual in nature.
By your logic Christian's that play metal are evil. And classical musicians who are satanists are playing good music?
You used the word "proof" but provided zero proof. Simply quoted an outdated and silly film. Well, partially quoted.
Is it not true satan takes what's intended for good and uses it for evil. Funny how so many Christian's cherry pick when that applies and when it doesn't.
Tell me again about metal being satanic...