u/Ned_Flangers

I've been trying to figure out how filter 1 and 2 pins 13, 14, 15, and 16, and op amp 1 and 2 pins 9, 10, 11, and 12 work. I just simply do not understand their purpose nor how to wire them for a delay. Maybe if someone had a suggestion for a circuit they knew that I could just copy that side of the circuit or if there was a resource for understanding these pins?
thanks!