Third, the : Hidden in the stereo mix are subtle guitar layers—arpeggiated clean chords in the bridge, a second distorted track panned hard right that plays a slightly different rhythm. Without the vocal masking these, you hear the production’s paranoia. The guitars are not in perfect unison; they are slightly out of sync, slightly clashing. It sounds like a room full of people shouting over each other. That is the point.
Cover bands and students use it to study Tré Cool's precise fills and Dirnt's pick attack. Green Day - American Idiot - Instrumental
If you want to learn how to play this song correctly, tabs only get you 70% of the way. Third, the : Hidden in the stereo mix