Doom metal is a form of
heavy metal that emerged as a recognized metal sub-genre in the early/mid-1980s. Doom metal is heavier and slower than other metal genres. Lyrics play a very important role in this genre, and are traditionally rife with pessimism, evoking an atmosphere of darkness, despair and misery. Musically, doom metal is strongly influenced by the early work of
Black Sabbath. A number of early
Black Sabbath tracks, such as "
Black Sabbath" are often considered embryonic or prototypical doom metal songs. Many of the tracks on their third album
Master of Reality (released in 1971) seem to have more in common with what today is seen as doom metal, with tracks such as "Sweet Leaf", and "Into The Void" that featured
Tony Iommi's guitar and
Geezer Butler's bass tuned down to C# for heavier riffing and reduced string tension for Iommi's previously injured fingers. However Black Sabbath was not the only influence- many doom metal bands started up only a few years after Black Sabbath's debut, some of whom hailed from countries that had not yet seen the rise of Black Sabbath's popularity.
See more at Wikipedia.org...