Hmm. For some reason I don't like that heading, "Invoking Mother Spirit"
I don't beleive it was the music, it was the anointing on David's playing. If it were the music, Saul could have sent for any of several musicians. Saul was in nned of deliverence from and evil spirit, and David's anointed playing drove the spirit away.
Just my 2 cents . . . .