I have a Moog schematic for a "Lag" module. Its a simple circuit with an adjustable Fc 0<160Hz LPF and some rectifier type diodes.
I have been able to model it in LT Spice and the curve looks smooth, however when I run it in reaktor its choppy along the zero crossing.
The difference is that with my Reaktor core macro design there is no feedback in the circuit.
However I was unable to use clipping modules to simulate diodes within the ZDF toolkit.
This is what it looks like in reaktor:
This is what its supposed to look like (LT Spice simulation):
This is the analog circuit, Note the rectifier diodes are within the Filter feedback loop