This is more than just an album by a great American band--it's THE great American pop album, an ambitious foray into the intricacies of harmony and melody. Masterminded by Brian Wilson, PET SOUNDS changed the rules of rock & roll. Once upon a time, rock and pop albums consisted of an artist's hit singles and the remainder was mostly filler. Wilson's production brought the concept of recording an album to a new level. He refined Phil Spector's wall-of-sound production style into a more complex, stunning approach. The result was inspired by the Beatles' RUBBER SOUL, and was, in turn, an inspiration for SGT. PEPPER.