Can you explain the "a slow ironic counterpoint to his own beliefs"? expecially "slow".
She'd met lots of crazy musicians, but no one like Clayton. He was as obsessed as the others, but he had a quirky sense of humor, a slow ironic counterpoint to his own beliefs. And he didn't look quite like anyone else.what does the term "to his own beliefs" refer to?

Question

Can you explain the "a slow ironic counterpoint to his own beliefs"? expecially "slow".
She'd met lots of crazy musicians, but no one like Clayton. He was as obsessed as the others, but he had a quirky sense of humor, a slow ironic counterpoint to his own beliefs. And he didn't look quite like anyone else.what does the term "to his own beliefs" refer to?

Answer

Learn to use a dictionary, and look up the word "counterpoint". It is a musical term. Once you understand the word "counterpoint", you will understand this sentence. 
Seriously, what are you reading?
counterpoint = 对位

Answer

Maybe it means "a bit ironic"