Analog VCO based on the GMSN Pure VCO

Features:

Dedicated outputs for each of the four waveforms
Attenuators for each waveform to a main output
Decent tracking for three octaves
PWM level/width
Linear FM
Hard sync
Front panel v/oct tuning

https://afterlateraudio.com/shop/product/aerialist-vco-eurorack-module/