Heavy metal music
Critics disagree over who can be thought of as the first heavy metal band. Most credit either Led Zeppelin or Black Sabbath, with American commentators tending to favour Led Zeppelin and British commentators tending to favour Black Sabbath, though many give equal credit to both. A few commentators—mainly American—argue for other groups including Iron Butterfly, Steppenwolf or Blue Cheer. Deep Purple, the third band in what is sometimes considered the "unholy trinity" of heavy metal (Black Sabbath, Led Zeppelin, and Deep Purple), despite being slightly older than Black Sabbath and Led Zeppelin, fluctuated between many rock styles until late 1969 when they took a heavy metal direction.
Pakistani rock
After the successful emergence of Vital Signs in the 1980s and Junoon in the 1990s, the heavy metal music genre began to rise after the 1997 general elections. Black Warrant was one of the earliest heavy metal band that released its very first album in the public. The roots of Pakistani heavy metal music can be traced back to the new wave of British heavy metal when it was transferred in late 1980s and early 1990s. In the 1980s, the bands Final Cut and Barbarians are considered the earliest Pakistani heavy metal bands. Although they were short-lived, they influenced many other musicians. Guitarist Salman Ahmad gained fame for his unique style of playing Sufi-style and neoclassical musics in heavy metal form.