The tune, or beat aren't what's satanic, but the words.
Satan will not glorify God. If rock instills rebellion, mocks God and promotes sin in it's WORDS, then it's satanic. On the other hand, if it instills a motivation to do Gods will, promotes unity and an alter call in the end...then it cannot be from satan, but a tool from God!
Some people can the traditional Hymns sung operatic, like on BBN, I cannot. Some like classical (If you like Beethoven, becareful, his later works were a dark time for him!) don't preach it to be the gospel! If you don't like rock, do not proclaim it to be a sin to those who haven't been convicted by the Holy Spirit. It's our job to minister, not condemn.
Lastly, remember, God can use a donkey (Balaam's) and he would make the rocks cry out. He can use Rock to get His message out that He Loves us!
God is in favor of 'separation'.
(ie. Heaven AND Hell.)
Pragmatism Rules!!!
/sarcasm