(SOUNDBITE OF SONG, "HOWLIN' FOR YOU") THE BLACK KEYS: (Singing) All right. EMILY FENG, HOST: In the early aughts and early 2010s, many listeners found The Black Keys through commercials. There was Nissan and Cadillac and Victoria's Secret. The duo's bluesy rock 'n' roll has a grungy, up-tempo feel that feels subversive, and that style win them half a dozen Grammys. (SOUNDBITE OF SONG, "GOLD ON THE CEILING") THE BLACK KEYS: (Singing) They want to get my gold on the ceiling. I ain't blind. Just a matter of time. FENG: Fifteen years later, they're still going strong, and they're experimenting with some variations to that bleeding electric guitar sound. Their new album "Peaches!" is something of a return to the blues-heavy rhythms that drove their early career. Dan Auerbach and Patrick Carney of The Black Keys join me now from their tour bus on the side of the road on the way to Mississippi. Thank you, guys, and welcome. PATRICK CARNEY: Thanks for having us. DAN AUERBACH: Thank you.…