Black Sabbath Vol. 4
Vol. 4 is the fourth studio album by the English heavy metal band Black Sabbath, released in September 1972. It was the first album by Black Sabbath not produced by Roger Bain; guitarist Tony Iommi assumed production duties. Patrick Meehan, the band's then-manager, was listed as co-producer, though his actual involvement in the album's production was minimal at best.