Metal bands weren’t the first to embrace dark imagery in their music – that tradition goes back to classical composers like Richard Wagner and blues artists like Robert Johnson – but they approached these subjects with a unique pomp, a hyper-masculine might that gave the genre a musical language of its own. In between, it’s been rejiggered for maximum extremity in underground subgenres like death metal, black metal and grindcore, and, beginning in the early Eighties, the genre as a whole had become a cultural movement capable of overtaking the pop charts. And Avenged Sevenfold ornamented it with catchy, head-turning melodies.

Metallica whirled it into a breakneck blur. Judas Priest dressed it in denim and leather. Its roots stretch back to the late Sixties, when artists like Blue Cheer, Iron Butterfly and Led Zeppelin cranked their amps to play bluesy, shit-kicking rockers, but it wasn’t until that fateful day, when Black Sabbath issued the first, front-to-back, wholly heavy-metal album – their gloomy self-titled debut – that a band had mastered the sound of the genre, one that still resonates nearly 50 years later: heavy metal.Īlthough Black Sabbath’s members have scoffed at the metal tag over the years, their lumbering, overdriven guitar, acrobatic drumming and forceful vocals, all originally intended to be rock’s equivalent to a horror movie, have been copied time and again, decade after decade. With a crash of thunder, the ringing of ominous church bells and one of the loudest guitar sounds in history, a heavy new music genre was born in earnest on a Friday the 13th early in 1970.

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