Alternate riff: ; etc.) 2. Alternating the bass note pulse on each beat with block chord versions of everything on the off beat 3. A combination of both. It's mostly just improvised patterns with the same notes to make it easier to sing the You could just play the main riff throughout the verses and it still sounds fine, just noting. He will always go back to the original main riff when going into the riff, though. For the instrumental riff , it sounds he's playing 3 notes outside of the (guitaretab.com)