Pet Sounds is the 11th studio album by the American rock band the Beach Boys, released May 16, 1966 on Capitol Records. Promoted there as “the most progressive pop album ever”, Pet Sounds attracted recognition for its ambitious production, sophisticated music, and emotional lyric content. It is considered to be among the most influential albums in music history. In 2016, a 50th anniversary edition box set presented the remastered album in both stereo and mono forms alongside studio sessions outtakes, alternate mixes, and live recordings. Of the 104 tracks, only 14 were previously unreleased.