I first tried to create a solid internal feedback loop and go from there, but the technology crammed in some of these things make altering the circuit pretty difficult. I was able to make two alterations that make this thing squeal and sputter pretty nastily as long as you have it in a feedback loop. Preferably a mixer feedback loop, or at least one with an EQ pedal. Testing the volume and gain knobs on the pedal with an EQ in the loop is what brings this to life. You'll get the most "action"when the pedal's knobs aren't up all the way and you are not feeding the signal chain a ton of the pedal's signal. Basically, you can experiment on your own, but after messing with this thing for an hour, I've found it's sweet spots. Which you can do as well. It will generate sound without an input but it's basically just hiss or a boring oscillation tone.
This thing is nuts. Each toggle and the button do a lot. So do the original volume and drive knobs on the pedal. I haven't tried it in a feedback loop. The sound clip is the pedal alone. The sound clip sort of speaks for itself since I can't really sum of the variety of sounds you can get out of this thing. Mostly in the high range, though.
This is a one-off for my friend Andrew Pigue. I recorded a video demo but I lost it somehow. Screw it. Just listen to the sound clip. Look at the description to see exactly which mode is toggled when, and when the feedback loop is switched on.
This one is entirely not interesting. It only really produces one kind of sound. I wired it to the LED. Click on the sample to hear it. It looks bad-ass though. If you want people to think you're a total nerd, you should buy this. Or you could get super creative with it and run it through a cool effects chain.