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' Second Album of the original album sleeve containing the US mono and stereo mixes. In 2014, the album was released on CD again, individually and included in the Beatles boxed set "The U.S. Albums", which contained the album's running order but with UK mixes as remastered in 2009. The album was also issued on the EMI subsidiary label Odeon in 1964 for the Japanese market. That version had the same title and similar cover art but contained different songs than the US release. With the massive popularity of "Meet the Beatles!" and a desire for additional Beatles product as well as an