Envelope
EG, ENV, Envelope
A dynamic Module in Synthesizers to form a continious movement, applied to an amplifier (VCA) the envelope can change the sounds contour (amplitude in this case) and makes it sound "percussive" or "with a long fade-in and fade-out" to swell like water on a beach.
Envelope ist das engl. Wort für Hüllkurve.