Red Rock Sound has launched PolyIvoks Filter, a filter Rack Extension developed on the basis of the filter of the legendary Soviet synthesizer of the 1980s.
PolyIvoks Filter brings stereo outputs and inputs to the legendary Soviet analog sound.
On the centre panel is located Patch Browser Display, as well as Bypass switch, just below it is the input level meter.
To the right of these, located the Filter block, Envelop and Output section.
Filter: The four controls adjust  Cutoff,  Resonance,  LPF to BPF switch,  Modulation (LFO) level and  Envelope level (You can set positive or negative values).
Envelope: repeating  Attack,  Decay envelope.
Output: And the rightmost unit has 2 regulators  Envelope level (You can set positive or negative values) and  Output gain.
The leftmost panels house the LFO controls,  Mode which offers four waveforms, including noise, and a stepped function for sample & hold effects, well as  Speed control.
PolyIvoks Filter is available from the Propellerhead Store for 39 EUR.