open today 12 to 7 ! on this date 42 years ago ! Vol. 4 is the fourth studio alb** by the English heavy metal band Black Sabbath, released in September 1972. It was the first alb** 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 alb**'s production was minimal at best.