The A-136 is a small but powerful waveshaper.
The triangle out of an A-111 VCO goes into an A-136, then into an A-132-3 VCA, controlled by an A-140 ADSR. VCO and ADSR are controlled bay an A-155, the Waveshaper is modulated by two LFOs (starting slow and then up to audio frequencies). LFOs are attenuated by an A-183-1 Dual Attenuator.
Technical Details can be found on Doepfer’s homepage:
Here we go: