Following the commercial struggle of the Tyr album, guitarist Tony Iommi and bassist Geezer Butler reconnected, eventually bringing back vocalist Ronnie James Dio. The band initially entered the studio with Cozy Powell on drums. However, the sessions were famously fraught with tension; Dio reportedly found the writing process difficult, and the creative friction resulted in a much darker, heavier sound than their previous collaborations. Rare Material and Tracklists
actually recorded demo vocals for the songs that would become Dehumanizer . :
: While official releases are rare, Martin has confirmed he recorded vocals for almost the entire album to see if the songs would work with him Alternative Tracks
: Often included in demo discussions, this version has a faster, more upbeat tempo compared to the brooding "album version" The Verdict Dehumanizer