Chirp

Effect · 2 CPU units

Green Screamer

by Chirp · CC BY 4.0

Staff pick: The classic overdrive, rebuilt from its circuit: open it to see the diodes and the 720 Hz mid hump.

The classic green overdrive, from its circuit: the op-amp's feedback loop with two silicon diodes across it, worked out from the diode equation and antialiased. Only the mids and highs above 720 Hz are driven, and the clipped part is added back over the clean signal, so the low end stays tight and the tone has that famous mid hump. Great as a boost in front of another drive.

Play it in Studio Download the file
overdrivedriveboost

How it's wired

Inputmids: onepolemidsonepoleclip: diodeclipdiodeopamp: gainopampgainsmooth: onepolesmoothonepoletone: biquadtonebiquadlevel: gainlevelgainOutput
soundfed back (a loop through a delay)moves a setting

Open it in Studio and click Edit inside to change any of it, and hear each change as you make it.