With Revolver, the Beatles made the Great Leap Forward, reaching a previously unheard-of level of sophistication and fearless experimentation. Sgt. Pepper, in many ways, refines that breakthrough, as the Beatles consciously synthesized such disparate influences as psychedelia, art song, classical music, rock & roll, and music hall, often in the course of one song. Not once does the diversity seem forced – the genius of the record is how the vaudevillian "When I'm 64" seems like a logical extension of "Within You Without You" and how it provides a gateway to the chiming guitars of "Lovely Rita." There's no discounting the individual contributions of each member or their producer, George Martin, but the preponderance of whimsy and self-conscious art gives the impression that Paul McCartney is the leader of the Lonely Hearts Club Band.
With Revolver, the Beatles made the Great Leap Forward, reaching a previously unheard-of level of sophistication and fearless experimentation. Sgt. Pepper, in many ways, refines that breakthrough, as the Beatles consciously synthesized such disparate influences as psychedelia, art-song, classical music, rock & roll, and music hall, often in the course of one song…