Bi N Tic filter section acting strange

[6079smith]

I'm stumped with this... I have a bintic that seems to be doing fine, up to a point. The oscillator is working well enough (healthy signals from the saw and square outputs *bridechamber PCB* and from the transistor input to the 4024) but the output after the filter is so low it can barely be heard, or else it sounds like a geiger counter when the tune pots are at very specific points. I can put a signal through the filter and again, it sounds like it's almost working. Damping (resonance) and Bandwith pots do very little, and need to be at their extremes for any audio to pass. I've tried swapping the CMOS chips, same results. The four opamps in the filter section seem okay as well. The only odd thing about the PCB is that the connections between the 4024 and the 4051s are backwards (pins 9, 11 and 12 on the 4024 go to pins 11, 10 and 9 respectivley, backwards w/r/t the schematic). Noticable problem: signal comes in bursts while twisting the tune pot, then fades after 1-2 seconds.
What am I missing? Bad capacitors?

[Sebo]

I think that's how should work.
In mine with bandwidth at 0, no audio will pass. Also with resonance at 0, I have to turn bandwidth really high to hear something.
Normally I start with bandwidth at max an resonance to zero and start tweaking from that.
With both reso an bandwidth to max the output should be really high, but it depends a lot of the frequency and the signal input.
Have in mind that is a comb filter.

[6079smith]

Okay, interesting. I just figured it would give an output as a regular VCO. I've only done rudimentary experiments with an actual audio input (basically just to test it worked), looks like I'll have to delve a bit deeper.
Thanks for the help.