Death Metal 
                      
  Out of the aggressive music and violent lyrics
  of Thrash/Speed Metal acts like Slayer rose
  Death Metal, a dark specter that played
  faster, with ultraviolent subject matter. In
  the '80s, bands from the U.K. (such as
  Napalm Death and Carcass) and from Florida
  (Death, Deicide, Obituary and Morbid Angel)
  created sounds appropriate for snuff films.
  Wallowing in gore, these bands used
  hyperbolically violent lyrics. Death Metal
  album covers are unmistakable for their
  fantastic, gruesome imagery.

  Death Metal is a low-rumbling beast, using
  down-tuned guitars to emphasize the bass,
  while the vocals rant ghastly tales in a deep,
  throaty, often incomprehensible Cookie
  Monster growl. Speedy blast   beats move the
  sound at a velocity that challenges the
  threshold of human ability exemplified by
  technical masters like Napalm Death drummer
  Mick Harris -- as much an athlete as a
  musician -- and the low, rhythmic blur of
  bands such as Gorefest. Though Death Metal
  is largely unevolved, its more political and
  punk elements spawned Grindcore. In
  Scandinavia, Death Metal bands became
  more gothic in tone, addressing Satanism,
  paganism, and Viking lore, and eventually
  mutating into Black Metal.