That video you linked to is private, btw.
I just got 1412 – Dual Modfilters working well. Had to set everything to 0 except Fmod, which I set to -12000. Anything higher leads to excessive high frequency buildup at higher Freqs. Then modulate the Freq from 12000 to 20000, which seems to actually be 0 to 20000 with Fmod set to -12000.
I couldn’t get pitchbend or MIDI CC Double working (lots of lag / couldn’t get the Least Significant Bit to register…), and DAW automation stutters with fast square waves, but MIDI CC Single works well, aside from only having 128 steps.