Album Master of Reality (Black Sabbath). Songs and videos online

Master of Reality is the third album by the British heavy metal band Black Sabbath, released in July 1971. It is noted as laying the foundations of doom, stoner, and sludge metal. Master of Reality was certified double platinum after having sold over 2 million copies.For the recording of this album, guitarist Tony Iommi, who had injured his fingers in a factory accident years earlier,decided to downtune his guitar down three semi-tones (or one and a half steps to C-sharp). This reduced string tension, thus making the guitar easier for him to play. Geezer Butler also downtuned his bass guitar to match Iommi. The result was a noticeably "darker" or "sludgier" sound that almost two decades later would prove hugely influential on at least three of the biggest alternative rock acts, namely Smashing Pumpkins, Soundgarden, and Nirvana.[Master of Reality was recorded at Island Studios in London between February and April 1971. The album was produced by Rodger Bain, who had also produced their previous two albums. However, this would be his final collaboration with the band.