Billy Corgan — £1,000 · Pro-Level Rig

• Big Muff Volume knob above noon — the fuzz cuts mids dramatically. Push the output to compensate and maintain presence in the mix
• Maximum Sustain on the Big Muff for Siamese Dream leads — Corgan used a near-infinite sustain setting for soaring lead tones
• The amp is slightly overdriven into the Big Muff — a clean amp makes the Muff too fizzy; a slightly-dirty amp rounds off the harsh top end
• Stratocaster neck pickup for solos — despite the high gain, Corgan often used the neck pickup for its warmer, more vocal character
• Studio technique: in "Siamese Dream" the guitars were quadruple-tracked with slight pitch and tone variations to create the massive layered sound
• Use a ProCo RAT in place of the Big Muff for the distortion-without-fuzz-character — more mid-forward and better for rhythm parts
• Tune down to Eb standard for the characteristic Pumpkins "heaviness" — most of the band's recordings are in Eb
• The chord voicings are often power chords with an added major third — the "Corgan chord" is not just a bare fifth

• ✗Not using a gate on the JCM800's high-gain channel — self-noise at this gain level is continuous and audible between notes. A noise gate is not a style choice; it is functional equipment for this gain level
• ✗Placing a tuner or buffered pedal before the Big Muff — most fuzz circuits (especially germanium ones) are sensitive to the impedance of the signal feeding them. A buffered pedal before the fuzz changes how the guitar volume knob responds. Run fuzz first in the chain
• ✗Ignoring the individual pickup volume and tone controls — the two-pickup switching options on a Les Paul give you four distinct tones within a single setting. Most players only use two.
• ✗Running amp gain at 10 — above 8 on most high-gain channels, the signal becomes a compressed, indistinct wall. Moderate-high gain with a boost pedal in front gives better results.
• ✗Clean amp at too low a volume — even a clean amp provides warmth and tonal character that the pedal sits in. An amp at minimum volume has no character for the pedal to interact with.
• ✗Moving the wah too fast — wah is a filter effect that needs time to sweep through its range musically. Fast rocking produces a quacking sound; musical use is slower and more deliberate.
• ✗Not using alternate tunings — the open, droning quality of dropped tunings is central to most grunge riffs. Standard tuning loses this quality.
• ✗Using a high-gain metal amp channel instead of a fuzz into a clean amp — grunge distortion has a different harmonic content and feel than metal. A Big Muff into a Fender is the correct circuit.

Stratocaster into a Marshall or Mesa Boogie, with an Electro-Harmonix Big Muff Pi running at maximum Volume to compensate for the fuzz's severe mid-cut. In the studio, Corgan layered up to 40 guitar tracks. Live, the Big Muff into a pushed amp delivers the wall-of-fuzz character of "Cherub Rock" and "Siamese Dream."