Carney's words came in response to the Spotify board member's SXSW prediction that the streaming service will eventually generate more revenue for the music industry than iTunes.

During a recent radio interview with WGRD in Grand Rapids, the drummer was asked whether he believed the Napster founder's claims. "No" was the response.

"Because he's an asshole," Carney explained. "The guy has $2.5 billion he made from figuring out ways to steal royalties from artists, and that's the bottom line.

"You ...