FX is the fourth track off of Black Sabbath's fourth album Vol. 4. It's an instrumental break before the fifth track "Supernaut". Vol. 4 Wheels of Confusion, Tomorrow's Dream, Changes, FX, Supernaut, Snowblind, Cornucopia, Laguna Sunrise, St. Vitus's Dance, Under the Sun Retrieved from "https://blacksabbath.fandom.com/wiki/FX?oldid=10206" Categories: Black Sabbath Vol. 4 Songs Community content is available under CC-BY-SA unless otherwise noted.