Finally got around to trying the new bob~ filter.
Works really really great.
I found that my keyboard (midi note) scaling of frequency logic was causing the frequency to go way too high when modulating thefilter frequency so I can use a kb tracking value of < 1 and the squelching doesn't happen. The audio rate q is great. My favorite way to use it is with 2 lfos, one lfo modulating the frequency of the other lfo and the other modulating the filter q. This along with an envelope makes the synth sound as if it's a stratocaster connected to a mashal amp and making wobbly feedback sounds when the filter starts ringing.
Besides that it's a really awesome moog emulator. On another note I removed all the IEM filter bank and tracked down some excess midi notein messages, my synth now is playable live with the fractal sequencer as well as qtractor sequencing without glitching.
Take note Ed Kelly. I noticed after a fresh install of ubuntu studio on a fresh machine 64 bit that the IEMlib was missing lots of objects, so I looked on my old laptop and seen a folder in pdextended/ext that I had named "deletethis" with note that iemcot4~ was not actually iemcot4! . I remembered I had to compile the 64 bit iemlib myself and had to fudge in some of the functions. So instead of copying over my compiled iemlib , I just erased my iemlib filter bank. it was kinda monstrouswith way too many objects. 2 sets of 9 filters for each of the 6 voices per synth. only 1 filter out of the 9 was active per bank but there were all those control objects that were used to select and turn off the inactive filters. I'm not sure why but my DSP cookbook filters implemented in fexp~ sound pretty good to be converted from c code I wrote like in 1998. I guess they are a bit processor hungry not sure how much better they would be as an external instead of in an fexpr~.