Looking For A Specific Crunch/Distortion Circuit

Cybercow

Cybercow

Well-known member
Does anyone know of a DIY crunch/distortion/over-drive pedal circuit that allows the user to control how clean or dirty the sustain/release transient is? I'm looking for a crunch/distortion DIY circuit that gives control over how much distortion is in the sustain and/or release of of the signal. The attack & decay transients should always be crunchy/dirty. There's likely going to be an envelope follower involved in the circuit.
 
not really ... some of what you describe is in the expandora's opto-fet in the feedback loop of the lm308 but the only way the user controls it is with dynamic playing. that said, it's a starting place for your idea
 
A precision rectifier (peak detector) with a smoothing cap, into a comparator (with threshold control) which drives the base of an NPN transistor. Configure the transistor as a current sink, so switching on increases the draw through a resistor and dynamically reduces the Vdd of a CMOS inverter or MuAmp. Would that work?

Signal peaking would drop Vdd, which increases distortion. Once signal is below threshold, Vdd returns to normal and distortion is reduced.
 
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Not looking to buy such a pedal, rather I'm focused on doing my own build. It's likely I'll need to seek assistance or a collaborator to design the circuit. And the transient-controlled crunch is just the front of the entire circuit I've got in mind. Inside the same enclosure, I want such a crunch circuit to be followed by a YaMama Mid EQ v0.1 circuit (as shown in @Chuck D. Bones' "FreakZEQ" Boneyard post) that provides adjustable Frequency & Q controls to its notch/boost capabilities.
 
I made a box kinda like this a few years back, I tried to find it or any docs I could have but nowhere to be found...
I started with the Boss EH-2 topology and replaced the EQ with a send/return... I had started to make a version with LM13700, that went all the way to ducking the fx loop as well but no idea where it is...

The idea was, the louder you play, the more signal is sent through the fx loop, the quieter you play, the more dry signal you'd get.. Dynamic fx loop if you will..

Is that what you'd be after? With an OD instead of the loop? If so, I will keep digging, I must have something somehwere.
 
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