Jeremy Denk played Mozart at Carnegie Hall Wednesday with the San Francisco Symphony. Eric Thayer for NPR Music hide caption

itoggle caption Eric Thayer for NPR Music

Jeremy Denk's new recording of Bach's Goldberg Variations comes out Sept. 30. Michael Wilson/Courtesy of the artist hide caption

itoggle caption Michael Wilson/Courtesy of the artist

"I've thought to myself often listening to some classical works: 'I think I want to make a couple million dollars and turn that into a pop song,'" Joshua Bell (right) says, laughing. "There's a lot of untapped potential there." Courtesy of the artists hide caption

itoggle caption Courtesy of the artists

Jeremy Denk has recently written for The New Yorker and The New York Times Book Review. Courtesy of the artist hide caption

itoggle caption Courtesy of the artist