This guitar lick uses a tuning Tommi Iommi from Black Sabbath made famous except here we drop the 6th string to a B. The tuning is B, Gb, B, E, Ab, Db. This really fattens up the guitar sounds and can make ordinary sounding riffs a lot heavier. I've got pretty light gauge strings on so you can hear a bit of extraneous noise. To tighten up the sound and make it even heavier I'd recommend a thicker set of strings if you play to make regular use of this tuning.
