Standard tuning — not Drop D — and a goading, almost childlike riff built on A-minor pentatonic over a droning open A string. The Battle of Los Angeles single runs Morello's 'Arm the Homeless' into the career-long 50-watt Marshall JCM800 2205 and Peavey 4x12. The verse hides a strange harmonized hum: the DigiTech Whammy set to add a fixed interval below the fretted note. The wandering solo weaves wah and Whammy together while the pickup toggle stutters the feedback. The gear stays mid-forward and tight; the weirdness is all in the pedals and the right hand.