Noise Engineering Pons Asinorum (black)

From the manufacturer:

Four-channel voltage-controlled envelope generator and LFO

Pons Asinorum is a compact four-channel multimode envelope generator and LFO with voltage control, three different envelope shapes, CV over cycle length, and a unique single encoder control scheme that makes mid-performance adjustments on single or multiple channels easy. Channels can be set separately to envelope or to LFO mode, giving Pons Asinorum maximal flexibility in a minimal footprint.