Revolver is the seventh studio album by the English rock band the Beatles. It was released on 5 August 1966 in the United Kingdom and three days later in the United States. The record spent 34 weeks on the UK Albums Chart, including seven at number one. In America, the album topped the Billboard Top LPs list for six weeks. Reduced to eleven songs for the North American market, Revolver was the last Beatles album to be subjected to Capitol Records' policy of altering the band's intended running order and content.
Revolver marked a progression from the group's 1965 release Rubber Soul in terms of style and experimentation, and heralded the band's arrival as studio innovators. The album includes tape loops and backwards recordings on the psychedelic "Tomorrow Never Knows", a classical string octet on "Eleanor Rigby", and Indian-music backing on "Love You To". Aside from methods such as varispeeding, reversed tapes and close audio miking, the sessions for the album resulted in the invention of automatic double tracking (ADT). As with other changes in studio practice introduced by Revolver, this technique was soon adopted throughout the recording industry.