The Pet Sounds Sessions is a 4-CD box set released in 1997 which compiles tracks from the Beach Boys' 11th studio album Pet Sounds (1966) and its 1965–66 recording sessions. The entire album is included in its original mono mix, as well as a specially-created digital stereo mix. The set also contains instrumental tracks, vocals-only tracks, alternate mixes, and edited highlights from the recording sessions for many of the album's songs, along with several tracks not included on the album.