Model 2231 Asymmetric Slew Limiter
(LW format, +/-12v) A dual slope-generator module with switchable Slew, Envelope, and Cycle modes, individually controllable rise/fall times, and attenuverter CV inputs.
www.slightlynasty.com/model-2231-asymmetric-slew-limiter/
Module is available as a DIY project only.
This Module is currently available.