CV Mutant shapes an envelope into the exact progression you want, and was designed as a translation matrix to convert any CV signal into another.
Map a combinator rotary to the Big Knob, allowing the rotary to take on any curve imaginable. Use the simple built-in LFO; internally routed to the envelope stages, morphing the LFO to take on any shape. Or use the built-in Trigger; for a one-shot play of the envelope with support for a sustain loop, and variable play-speed and amplitude based on the note played.
Take full control of your CV Signals! CV Mutant Envelope Shaper will make your life easier and a whole lot more interesting!