I love that idea, and that's a fantastic concept that make this instrument unique. But the same problem occurs every time one sound goes thru any filter. So, with first filter, one try to get a normal wave, and it is destroyed by second track filter... that time, it's really impossible to figure what was original waveform.
And I was a little bit optimist when I thought one can rebuild original waveform with both filters because I always tried to mimic one only note. But when changing note, completely different settings are necessary (even with tracking set to 32... or without tracking for either of the 2 filter). Worst of all, when moving from one note to another one, we can hear what is the problem.
For example, in this picture, I tried to make best square wave.
Filter settings are: Flt1 Frq 127 res 25, Flt2 Frq 33 res
It looks different than original, but it's possible to see a sort of analog square wave. Sonically, there is something weird. When changing note, the problem is evident : there is way too much quint under the fundamental (Harmonic 5 1/3). Certainly due to HiPass huge resonance. And the sound doesn't stop quickly... it remains with that resonance. So those setting are really unusable.