fuzz face behaviour with an opamp ... ?

[Steben]

Imagine a high gain opamp stage with a low input impedance and asymmetric clipping.
How much will it differ from a fuzz face?
Or am I swearing in church? 

The duty cycle shift might be absent .... ?

[ElectricDruid]

Sounds like a breadboard experiment waiting to happen?!?

After all, that's not many parts to get set up, right? Best way to know is to try it.

PS: You can probably get some duty cycle shift in with a bit of wrangling. I know there have been things that headed in that direction in the past.

[FSFX]

Sounds like a breadboard experiment waiting to happen?!?

Might be an interesting thing to try with an LM3900.

[FSFX]

The most (potentially useful) chip is the LM3900. OK, it isn't a 'normal' op amp, but it IS designed to run with a single supply & you can do all manner of cool shit with it. BUT, the pinouts are so weird, nobody ever bothered
Big plus for the 3900: bcause you have to think in terms of currents rather than voltages, you are forced to think like a 'real' engineer.
(often to be found when demolishing cheap industrila ontrol electronics from the 70s).
Thanks to the Stompbox Forum, I doubt there is an 'overlooked' transistor anywhere in the world!

[Fancy Lime]

Single inverting opamp stage with 5k input resistor and a 1M pot in the NFL. The usual voltage divider plus a medium sized cap (22u or so) at the non-inverting input. And then a bit of the output signal going to the non-inverting input via a diode and a resistor for that duty cycle shift. Possibly diodes in the NFL to keep the output volume reasonable and increase the distortion. Needs some experimenting but conceptually quite simple. And low parts count.