Nearly all of the "psychedelic" music throughout the entire film consists of one song, "A Saucerful of Secrets", from the 1968 Pink Floyd album of the same name.
This movie does not contain any sound recorded during shooting. None of the characters can be heard speaking. The entire sound track consists of voiceovers, music, and sound effects.
Played on a double-bill with The Devil's Rain at a Hawaiian drive-in theater in 1975.