[sdiy] to opamp buffer or NOT with ota's

[David G. Dixon]

> Resonance harsh-or-smoothness is mainly affected by exactly what feedback
> scheme you use.  The feedback topology is the biggest difference from one
> OTA filter to the next.  The key to smooth resonance is to put some kind
> of smoothing overdrive/fuzz type circuit in there so that as the voltages
> start to multiply at the resonance peak there is something to keep them in
> check in a musical sounding way.  Usually some back to back diodes or LEDs
> or similar is used (a-la tube-screamer), but a deliberately limited class-
> A common emitter stage (a-la fuzz-face) could also be used.

Nicolas, don't you find that back-to-back diodes clip the signal in such as
way as to give fairly gnarly sine waves, at least from the first one or two
poles?