This patch uses three modules:  the Cynthia Zeroscillator, the CGS Serge VCS, and the XR-2206 VCOs.  If you’ve ever tried patching a ZO output back to its linear FM input, you were probably surprised when the oscillator stopped.  I don’t know why.  But I had an idea to use the VCS as a type of divider in between.  So the ZO pulse out goes to the VCS trigger input and the VCS AC out to the ZO Linear FM input.  If that’s not enough, the XR-2206 controls the ZO Time Reversal input.  The monitored signal is the ZO triangle out.  With some knob twiddling, this is one possible result.