A form of Hard Rock that began with Black Sabbath, Led Zeppelin and Purple Haze in the late 1960s and early 70s. Metal is considered the Biggest of the three main forms of Hard Rock, followed by Punk then Grunge. Heavy Metal is composed of big, aggresive sounds produced primarily by electric guitars, bass guitars, and drums. THe vocals are generally very guttural (hoarse and deep voice sounds) or high pithced and shrieking. Metal has almost countless sub-genres including, but not limited to, Hair/Glam Metal, Speed Metal, Thrash, Classic Metal, Nu Metal, Gothic Metal, Black MEtal, Folk Metal, Progressive, and many more.
Some of the greatest Heavy MEtal Bands include Black Sabbath, Led Zeppelin, Iron MAiden, AC/DC, Anthrax, Metallica, KISS, Motley Crue, and Alice Cooper