Available For The First Time In Nearly 50 Years Transferred From The Original Half-Inch Four-Channel Masters Blu-ray With 192/24 Resolution Quadraphonic And Hi-Res Stereo Mixes Paranoid is the second studio album by English metal band Black Sabbath. Originally released in September 1970, it was the band's only LP to top the UK Albums Chart until the release of 13 in 2013. Paranoid contains several of the band's signature songs, including "Iron Man", "War Pigs" and the title track, which was the band's only Top 20 hit, reaching number 4 in the UK charts. It is often regarded as one of the most quintessential and influential albums in heavy metal history. Quadraphonic sound, or 4.0 surround sound, utilizes four audio channels connected to four speakers positioned at the corners of a listening space. The multi-tracked audio is mixed dimensional, immersing the listener in an expansive soundscape.