Revolver (Beatles album) as the Beatles'. While also highlighting the importance of the production, David Howard writes that "Revolver" was a "genre-transforming album", on which Martin and the Beatles had "obliterated recording studio conventions". Combined with the similarly "visionary" work of American producer Phil Spector, Howard continues, through "Revolver", the recording studio had become "its own instrument; record production had been elevated into art." Whereas "Sgt. Pepper" had long been identified as the Beatles' greatest album, since the 2000s "Revolver" has often surpassed it in lists of the group's best work. Sheffield cites the album's 1987 CD release, with the full complement of
The Beatles (album) the Byrds. Edwin Faust of "Stylus Magazine" described "The Beatles" as "foremost an album about musical purity (as the album cover and title suggest). Whereas on prior Beatles albums, the band was getting into the habit of mixing several musical genres into a single song, on "The White Album" every song is faithful to its selected genre. The rock n' roll tracks are purely rock n' roll; the folk songs are purely folk; the surreal pop numbers are purely surreal pop; and the experimental piece is purely experimental." The only western instrument available to the group during their Indian visit