Dehumanizer is an album by British heavy metal band Black Sabbath released in 1992. It is the first album in over a decade to feature Ronnie James Dio and Vinny Appice. Initial writing and demo sessions at Rich Bitch Studios in Birmingham featured Cozy Powell and ROIO exist.Both lyrically and musically, it is considered one of Sabbath's heaviest albums. Song themes vary from a computer worshipped as a god, to televangelists, to individualism and doubts about after-life.'Computer God' was the title of an unreleased song by The Geezer Butler Band, in 1986 - only the title made it to 'Dehumanizer'. The GBB version is available as a download on Geezer Butler's website. 'Master Of insanity' was also an unreleased GBB track and the 'Dehumanizer' version is essentially a re-recording of this. (1:17 minutes of this track is available as a download on the website of Carl Sentance, erstwhile vocalist with The GBB.)Although the band lineup is the same as 1981's Mob Rules, the musical direction is