Who produced Black Sabbath's 1971 album 'Master of Reality'?

“Who produced Black Sabbath’s 1971 album ‘Master of Reality’?” — Rodger Bain produced Master of Reality.

Bain had already produced Black Sabbath’s first two albums, Black Sabbath and Paranoid, making Master of Reality the third consecutive Sabbath record under his production. His work helped capture the band’s dense, powerful sound while preserving the rawness that defined their early recordings.

The album was recorded at Island Studios in London between February and April 1971. During the sessions, Tony Iommi and Geezer Butler experimented with downtuning their instruments, producing a darker and heavier sound that became central to the album’s influence on later stoner and sludge metal.

Master of Reality was Bain’s final Black Sabbath album as producer. For subsequent releases, production duties shifted toward members of the band, particularly guitarist Tony Iommi. This is why Tony Iommi is sometimes mistakenly selected as the answer: he was increasingly involved in the band’s studio direction, but he did not produce this 1971 album.

The album was released in August 1971 and reached number eight on the US Billboard 200.