OK, I know everyone has their own opinion about this topic. Most people would say Black Sabbath. But, Blue Cheer's first lp came out in 1968, and Black Sabbath in 1970. Of course, Hendrix came first...but I don't consider any of his tunes heavy metal. For the origins of Heavy Metal....It's got to be "Parchment Farm", by Blue Cheer. I'm ready!