Revival is the 21st studio release of the Christian rock band Petra and their third praise album. It was released in November 20, 2001. Again, this album was released amidst some major changes for the band. Three members had departed the band, so Bob Hartman decided to return from his self-retirement to help cement the ground for their next album. Also, the band was dropped from their label (Word/Epic) which started a search for a suitable record label to launch their next album. Inpop Records (founded by Wes Campbell and Peter Furler of newsboys) picked the band and geared for their next release. It was decided by both the band and producers that the best way to follow was a third praise album. They also decided that, instead of hiring new members, they would stay with remaining core members (John Schlitt, Louie Weaver, Bob Hartman) and use studio musicians for bass and keyboards. The music features a more electric and synthetized sound, using heavy programming and sampling without sacrificing Hartman's guitar sounds or Weaver's rhythm.