Pribor Pedals Envelope Filter F-7 Polivoks Low Pass Band Pass LP BP guitar bass pedal cv controlled

Custom ordered pedal from the Russian, Saint-Petersburg based builder - Pribor Pedals. Based on Polivoks filter schematic and layout with added envelope for better usability with guitar and bass, but you can always turn envelope depth to zero if you don't need it.

Controls are following:
Input and Output on the back
On the very top:
- Envelope indicator LED
- CV1 & CV2 inputs (you can use external sequencer or lfo to modulate the filter cutoff)
- Operation indicator LED
Top control row:
- Fast/Slow envelope mode switch
- Up/Down envelope mode switch
- Band-pass/Low-Pass filter mode switch (the manufacturer wrote it's noy Band-Pass but Hi-pass, however for me it ounds closer to band-pass and it's closer to truth if it's based on Polivoks which have LP&BP filter modes)
- Filter cutoff
Bottom row:
- Envelope sensitivity
- Envelope depth/level
- Filter resonance (yes, it can self-oscillate at high settings!!!)

Assembled on the breadboard but everything looks soldered very well, professionally & reliably. Works as it should.

Pedal is in mint condition.