Here is the schematic of the circuit that I added to the Insect-a-tron second hand synth.
You can see a bigger picture if you check out the flickr page here.
NOTE: The 50k pot is a dual (stereo?) and I added two leads coming off the second half. One goes to +v and the other goes to somewhere around the 10k resistor all the way on the left hand side of the left lm386 LFO. There is a switch that will deactivate this second connection. That is what the lower switch on the left of the keyboard controls.
I guess you could say I kinda did a bend on my own circuit.
Here is another… better… video I made of the Insect-A-Tron.
I didn’t realize it but at around 1 minute it almost sounds like the X-Files theme song!!!