MiniMod DH-ADSR Envelope

An ADSR envelope built on the Model D contour generator's discrete transistor circuitry, with its punch and its multiple trigger behaviour, and a Release control added so decay and release are set apart. Three modes join it: Delay-Hold for complex envelopes, Retrigger, which repeats the envelope with PRE-DEL setting the time between retriggers and HOLD the gate length (down to LFO rates), and Slow, which runs the envelope at a fifth of its speed. A button triggers it by hand and an inverted output joins the regular one.