@inlandempire
You're completely right.
This was posted before I got any good at filters. It's far from accurate to the Oberheim filter - I was naïve when I posted this. This here was my first attempt to match the filter, and didn't factor in any nonlinear components in the circuit.
It sounds like you've found some odd issues. It's possible that I wrote the node wrong and that it's become outdated as Hise updated - this was also released back when I had very little experience with writing nodes for Hise... This is to say, don't expect too much from this filter. I personally wouldn't use it now.
I'll be releasing more free dsp in the near future, so if you're interested in filter designs, my better filters will be available in hopefully not too long.

