i don’t have the subharmonicon but i do have the DFAM, looks like they both lack MIDI input (unlike Mother i think).
I had hoped that the Model Cycles MIDI-3.5mm out could also send a trigger to sync with analog synths but i don’t think thats the case. Unless you have retrokits rk-whatever. I have to run midi from the M:C to my Microbrute and send a trigger out from there to my DFAM. From the layout, subharmonicon seems to be about the same situation. Could be wrong. Hope this helps.