Revolver (Beatles album) audio miking and automatic double tracking (ADT), in addition to employing musical instrumentation outside of their standard live set-up. Some of the changes in studio practice introduced by "Revolver", particularly ADT, were soon adopted throughout the recording industry. The sessions also produced a non-album single, "Paperback Writer" backed with "Rain", for which the Beatles filmed their first on-location promotional films. In the UK, "Revolver" fourteen tracks were released to radio stations throughout July 1966. In the US, it was the last Beatles album to be subjected to Capitol's policy of altering the band's intended running order and content. The release
1 (Beatles album) of America. The album is the best-selling album of the 21st century in the US and the fourth best-selling album in the Soundscan era (1991–present). As of February 2014, the album has had sold 12,410,000 copies in the US. In the US, the album secured the Beatles a fourth decade in which they placed an album at number 1 on the "Billboard" chart. In Canada, "1" debuted at number 1 on the Canadian Albums Chart, selling 54,668 copies in its first week. The album was certified Diamond (1,000,000 units) by the CRIA in February 2001, just four months after its