The devils music.

Can art be bad? Not quality-wise, but ethical-wise? I don't really know what brought this question on, but being a big history and theology buff, I learned that in the middle ages the catholic church censored art that in their opinion, was 'sinful.' They had certain tones on the instrument that one was forbidden to play because they were considered 'the devil's notes,' and even recently in the 1950's people were speaking out against rock and roll music claiming that it was sinful and corrupting.  There were also burnings of 'evil' books, and sacrilegious paintings and sculptures. But in my mind, unless one is a catholic, one should not have a problem with any artwork. So, can art truly be 'evil'? even to a nonreligious person? And is there a difference between 'sinful' art and 'evil' art?