It sounds like Jack recorded the second guitar playing riffs in the background with either a slide or whammy pedal, and then reversed it, for the following reasons: 1) The notes get louder towards the end of each riff, as opposed to dying away 2) The frets are inaudible Second guitar settings: Amp Settings: High bass, low middle and treble, medium gain and lots of reverb. Guitar Settings: Pickups forward, low tone. GUITAR 2 RIFFS : RIFF 1 RIFF 2 RIFF 3 RIFF 4 INTRO: A5 G5 A5 X X BREAK: P (xguitar.com)