I heard an interesting radio program on PBS the other day regarding the neuro-science of music. Researchers discovered that when you hear music you enjoy, your brain releases endorphins, causing you to feel good, and have a overall sense of well-being.
If, on the other hand, you hear music you don't like, your brain releases adrenaline, the fight or flight hormone.
This might explain a lot of the conflict that happens in churches over music. It's merely a matter of endorphins vs adrenaline!