Revolver was promoted with the release of its fourteen tracks to radio stations in the United Kingdom throughout July 1966. Some of the changes in studio practice introduced by Revolver, particularly ADT, were soon adopted throughout the recording industry.
With no thoughts of reproducing new material in concert, the band made liberal use of studio techniques such as 'varispeeding', reversed tapes, close audio miking, and automatic double-tracking, in addition to employing instrumentation outside of their standard live setup. Revolver was the band's final recording project before their retirement as live performers, and marked their most overt use of studio technology at that point, building on the advances of their previous album Rubber Soul (1965). Much of the album's songs reflect the influence of psychedelic drugs such as LSD, and the increasing sophistication of the band's lyrics to address themes including death and transcendence from material concerns. Produced by George Martin, it was recorded after a three-month break from professional commitments at the start of 1966, during a period when London was considered the era's cultural capital. It was first released on 5 August 1966 by Parlophone in the United Kingdom and on 8 August in the United States by Capitol Records. Revolver is the seventh studio album by English rock band The Beatles.
