Conjured Circuits has produced the Cloak & Dagger, a completely analog filter / distortion module based on the ARP 4072 "post-lawsuit" filter. With resonance compensation, switchable drive pre and post filter, and attenuverters for both CV inputs, the Cloak & Dagger is an incredible way to add several flavors of 2600-style sound to any Euro rig.
Cloak & Dagger Features
4-pole lowpass filter based on the ARP 2600 4092 submodule, the "post-lawsuit" filter
Switchable drive for input and output with dedicated level control and CV input with attenuator
Two CV inputs for cutoff frequency with dedicated attenuverters
Self-oscillates at ~80% resonance
Built-in "resonance compensation" ensures low frequency levels remain consistent as resonance is increased
Dedicated 1V/oct input for musical filter tracking