Paul McCartney & John Lennon Listening to Playback, Abbey Road Studios, 1963

NOTE: This photograph comes from the Raj Prem Collection.

Paul McCartney & John Lennon at Abbey Road Studios.

The Beatles utilized the studio to full effect by breaking with tradition, changing recording techniques, and forever pushing the boundaries of what was considered popular music. They experimented with flanging, backwards recording, automatic double-tracking, and controlled feedback, among countless other innovations.