YouTube sensation Rob Scallon is on a life-quest to write original heavy metal songs in unconventional ways. He's connected to his viewership, and takes on challenges from his fans to try out different songs arranged around whatever they can come up with. Recently, a viewer asked him to make a song entirely composed of tritone guitar playing, a.k.a. "the devil's interval," and he was more than up for the task.

If you weren't aware of what a tritone was, Scallon lays it out in his video description. "A tritone is referring to a particular musical interval (how far away two notes are from each other) and is renowned for it's dissonance and harsh feeling of tension. A tritone name refers to the 3 whole tone distance between the two notes," says Scallon.

What results in the video is a disgustingly heavy riff that chugs and goes nuts from its beginning. He shows off the tritone shifting from guitar chugs to riffs, transforming the exercise in songwriting to something genuinely great to hear.

Rob Scallon's videos come in some pretty hilarious and straight up weird varieties. In recent months he's played heavy metal in some inappropriate places, turned Slipknot's "Psychosocial" into a banjo cover, shredded through every Rage Against the Machine song in three minutes and converted Metallica's "For Whom the Bell Tolls" into some straight up bell work. Because why not?

Check out Scallon playing the all tritone song above!

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