Feedback Bass 2
Create the feedback loop:
1: Mixer to VCA-B/LPF in.
2: LPF to Mult.
3: Mult to Mixer In-1 and In-2.
The LPF will attenuate and boost certain frequencies. Find what sounds right. Find the right balance between the LPF and mixer levels.
Try:
Patching both the mixer and filter back into the Mixer.