Simple ADSR Envelope

Is there an advantage to that?

I’ve been pleased with the Kassutronics design, to which I added retriggering and looping. For many applications the Schmitz/Yusynth/etc. designs’ slowness in reaching 0 V (or the sustain level) is not a significant problem but for when it is, the Kassu’s precision rectifiers work very nicely.

You sometimes see such a resistor to provide some current limiting protection in the event of an overvoltage input, but that’s not relevant here…