I'm in the midst of a research project for my Christian Heritage class. My subject is worship music of the reformation era. It turns out that some of the Reformers didn't think it was right to use music in formal worship, while others, like Luther, said things like this:
"A person who...does not regard music as a marvelous creation of God, must be a clodhopper indeed and does not deserve to be called a human being; he should be permitted to hear nothing but the braying of asses and the grunting of hogs."
Wow! "...doesn't deserve to be called a human being." (!) That dude was serious about his appreciation of music!