I dont believe Satan could write Biblicaly sound music. It could contains some or much truth but there would always be a lie designed to harm the listener. Satan comes to deceive kill and destroy.
Only God cannot lie.
Good friends of ours (Mormon) invited us to their son’s baptism. We hemmed and hawwed about it, but figured we wouldn’t view it as worshiping - but as supporting our Mormon friends.
It was fine, except for singing one of the hymns. It had the same melody as a familiar hymn, and IIRC familiar words. “By his blood we are saved, we are set free...” type stuff.
Until it got to some later verse where it went something like “Surely Joseph Smith doth died for me....” (We quit singing!)
I agree. And Satan can’t create anything. He can copy or distort, but not create.