Dad Rock: Beatles’ ‘Revolver’ Album Turns 50

Even though Sgt. Pepper’s Lonely Hearts Club Band understands the most acclaim, the Beatles recorded a masterwork a year before  with Revolver. This pivotal album showcased a  mixture of musical styles, with songs filled with studio effects (the beginnings of the psychedelic era) and musicians beyond   just John, Paul, George and Ringo (a string octet, anybody?) .