/diy/ - Do It Yourself

Right now I'm building/half way designing a three (maybe four) in one fuzz pedal with a simple ring mod and 3 band EQ with a LPF. One fuzz is more distortion like, one is a crazy synth/octave up monster, and the last will be a more hairy, traditional fuzz (currently using Big Muff fuzz circuit). Pic related is part of the current schematic. Mind you, this is very much a WIP, so there's stuff that needs to be added/removed.

Current progress includes getting the first fuzz to behave properly. I was always having something going wank with the gain knob, fuzz sound, etc. However, it finally works for some reason (I suspect it's an impedance issue...maybe).

Also, there's a high pitch note that I figured out to be ~15.5kHz present in the audio. I can't figure out where it's coming from, especially seeing as I've already tried to clean up anything that might be coming from the power supply. But who knows, maybe I missed something. I am only a hobbyist after all. Anyone have any tips that might help with removing that?