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Solo Tone

Symptom of the Universe

Black Sabbath

Guitarmetal1970s

Original Gear

Guitar1970s Gibson SG Special (heavily modified, likely with P-90 pickups or custom John Birch pickups)
AmpLaney Supergroup 100-watt head (EL34-powered, early 1970s model)

Amp Settings

gain7.5
bass3.5

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Effects & Signal Chain

Notes

Studio recording, 1975. Tony Iommi used his main SG Special with either original P-90s or custom John Birch pickups. The amp was a Laney Supergroup, cranked with a Dallas Rangemaster treble booster. No evidence of additional pedals or effects in the solo section. No time-based or modulation effects audible in the solo. No effects loop used.

Tone Character(10)
fuzz-like sustainraw and aggressivemid-forward crunchbright and biting top endsludgey and thicktight and percussive attackslightly compressed from treble boosternot modern high-gain, but saturateddistinct British EL34 crunchno ambient or time-based effects

Difficulty

The solo requires fast picking, accurate bending and vibrato, and control over a saturated, noisy tone at high speed. The technical demands and tempo make it challenging for most players.

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Symptom of the Universe by Black Sabbath — Solo Tone Settings | ToneAdapt