[major_gaff]

Try the devil's tritone. Sabbath did it first.

Hendrix used it on "Purple Haze" in '67, 3 years prior to Sabbath's first
album. That being said, I agree with you on Black Sabbath being the first
truly heavy metal band.

[OA5599]

Hendrix used it on "Purple Haze" in '67, 3 years prior to Sabbath's first album.

I actually forgot about that! I did know that trivia at one point. Thanks for the reminder. Okay yes, you are technically correct. But it was just the opening chords of one of his songs, and not something he repeated. I don't think anyone would feel Purple Haze is a heavy metal song. So, to paraphrase some dude in a SCOTUS case on pornography:

"I shall not today attempt further to define the kinds of music I understand to be metal... but I know it when I hear it."