Revelations is the third and final studio album by the American rock supergroup Audioslave. Lead vocalist Chris Cornell departed the band shortly after release in February 2007. The album was released on September 5, 2006 in the U.S., and a day earlier in the UK. Brendan O'Brien, who has produced or mixed the albums of numerous major rock acts of the past twenty years, including Soundgarden, Rage Against the Machine, Stone Temple Pilots, The Offspring, Pearl Jam, Incubus, and Bruce Springsteen, was at the helm for this record.