Dehumanizer is the sixteenth studio album by British heavy metal band Black Sabbath, released in June 1992. It was the first Black Sabbath studio album in over a decade to feature Ronnie James Dio on vocals and Vinny Appice on drums. It is also the first in nine years to feature original bassist Geezer Butler. Initial writing and demo sessions at Rich Bitch Studios in Birmingham featured drummer Cozy Powell; bootlegs of these sessions exist.