The ADDAC220 is a stereo envelope follower that combines analog signal shaping with digital processing to extract dynamic CV and gate information from audio. Each channel features adjustable gain, clipping detection, and a slew-limited, smoothed CV output that responds with nuanced detail. A digital Savitsky-Golay filter provides low-noise envelope tracking, while the Response Curve control mimics traditional envelope shapes (logarithmic/linear/exponential). Features Stereo or dual mono analog/digital envelope following Gain, offset, attack/decay, and curve controls for shaping Inverted and averaged CV outputs (+/-10V range) Gate output with threshold and visual indicators Built-in smoothing and dynamic range mapping 12-bit ADC with Savitsky-Golay filtering CV range up to 0–10V (or -10 to 0V inverted) Video: https://youtu.be/lC3vWeToXWYProduct Specs Item Number: 37337 Make: ADDAC System Model: ADDAC220 Dual Envelope Follower+ Condition: Brand New Finish: Black Categories: keyboards-and-synths ⇒ eurorack Made In: Portugal MPN: ADDAC220