Watch the Smoke and Burn online guitar lesson by Chris Buono from 50 Metal Guitar Licks You MUST Know

Even today the power chord is the bedrock of metal guitar and rightfully so--it's basic makeup is the pulverizing interval of a fifth. Drenched in harmonically rich overdive and fueled by some neighbor [dis]approved decibel levels, the sound of a root-fifth chord will even get grandma throwing up a devil horn. But, did you know there exists another powerful sounding interval that will aptly bring the rain? Enter the perfect fourth. The inverted alter-ego to the perfect fifth, the interval of a fourth was the fuel behind such legendary firestorms as Deep Purple's "Burn" and the ultimate 'must-know' riff, "Smoke on the Water". Let's combine the two over an onslaught of modern double bass mania.