in Birmingham. At this stage, the band still featured drummer Cozy Powell. These demos are highly sought after by collectors because they feature Powell’s signature powerhouse drumming on early versions of tracks like "Computer God" and "Letters From Earth". The Monnow Valley Rehearsals:

: While these demos are rarely heard in full high quality, they confirm that Martin recorded vocals for several Dehumanizer tracks.

Final album track length: 5:10 | Demo length: 5:58

The band retreated to Rockfield Studios in Wales—the same pastoral setting where Paranoid was recorded. The goal was to capture the raw, unfiltered aggression of the early 70s, but filtered through the political dread of the Gulf War and the rise of global cynicism. Iommi’s riffs were slower, detuned, and heavier than ever. Geezer’s lyrics were apocalyptic. Ozzy, free from the commercial pressures of his solo pop-metal, was snarling again.

These demos feature the heavy-hitting team of Tony Iommi (Guitar), Geezer Butler (Bass), Cozy Powell (Drums), and Ronnie James Dio (Vocals).