Does anyone want to take a stab at this? I've drawn it up on paper, but it looks like a dogs dinner still, so a neater layout would be appreciated. The chips are stupidly cheap, and I would like to try to add this to a fuzz.
Description from Beavis Audio:
Many months ago I added a simple mixer and an opamp function generator to a big muff pi. The result was a tunable oscillator that I could riff along with. What could be better than a drone oscillator? Why, two drone oscillators of course. This simple design uses a 40106 Schmitt Trigger chip to create two tunable tone sources.
I drew this up some time ago but have not built it yet, so this is unverified! This is a quad-oscillator, and you can also use the left over pins to make an LFO! If you just want to make a dual, build half the layout and ground the unused inputs. Maybe you can let me know if it works? :)