Many music industry executives facing a CD sales slump love the sound of Guitar Hero and Rock Band.

The video games have millions of followers who memorize every note of songs so they can jam along — and they often buy the original version of their favorites. In addition to the publicity, the record labels get licensing fees from the game publishers.

But not all music industry executives are singing “Hallelujah.” Edgar Bronfman Jr., chairman and chief executive of Warner Music Group, recently grumbled that the record labels deserved a bigger piece of the spoils from the games’ success.

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