Heavy Metal is a flow of rock music that developed in the 1970s, with roots from blues rock and psychedelic rock. This musical flow with a very strong guitar distortion, long guitar solo, fast beat, both instrumentation instrumentation.
The name Heavy metal was conceived by the hard rock band of the 1960s, Steppenwolf, in their song Born To Be Wild (found in the second line of the second stanza). "I like smoke and lightning Thunder heavy metal Racin 'with the wind And the feeling that I am under". The term was not used properly until in 1970, when Black Sabbath released their debut album entitled "Black Sabbath". From the 1960s or could be called the Blues rock period with examples of bands like Led Zeppelin, AC / DC. Classic metal around 60'an to 70'an or called Classic Rock period with example bands such as Black Sabbath, Blue Oyster Cult, Deep Purple, Alice Cooper. Classic metal music games are controlled by more Blues riffs.