Freak Out! is the debut album by American experimental rock band The Mothers of Invention, released June 27, 1966 on Verve Records. Though often cited as one of rock music's first concept albums, the real unifying theme of the album is not musical, but a satirical attitude based on frontman Frank Zappa's unique perception of American pop culture. It was also one of the earliest double albums in rock music, and the first 2-record debut. The album was produced by Tom Wilson, who signed The Mothers, formerly a bar band called the Soul Giants. Zappa said many years later that Wilson signed the group to a record deal in the belief that they were a white blues band. The album features vocalist Ray Collins, along with bass player Roy Estrada, drummer Jimmy Carl Black and guitar player Elliot Ingber, who would later join Captain Beefheart's Magic Band under the name Winged Eel Fingerling. The band's original repertoire consisted entirely of cover songs. When Zappa joined the band, he notonly changed their name but expanded its music to include a wide range of original material.