Also, make sure you approach him from a standpoint of LOVE. He's trying, he's putting forth effort, but it sounds like he needs to be more humble.
Didn't Jesus give us that example. Does this person BELIEVE what he reads in His Bible? Is he a SPIRIT- filled TRUE worshipper (in Spirit and in Truth?) who is ignoring/grieving the Holy Spirit w/ his actions and attitude OR did your church give this incredibly important role to "any old musician".
Brothers, we have to take positions in the church VERY seriously. Where is the reverence for GOD? Where is the yearning for Excellence IN ALL THINGS for the Most High?
He either believes his attitudes and actions are in line with the Bible (see I Chor. 13 -- the "Fruit" of the Holy Spirit) or they are not. He should feel the conviction of the Holy Spirit, but if he IS oblivious, we should lovingly ask "why?"....
I don't know what you guys think, but isn't your answer found in the Word -- how can he deny that? One must know the word however, to realize that -- look at some of Pauls letters to the churches!
Also, its important to pray fervently for this brother. God will work on His heart, but you should be praying for Him, again out of your Love for Him.
God Bless.