[sdiy] Simpliest envelope follower

[Johannes Öberg]

Hi! I'm finally going to put together a Rene Schmidt MS-20 filter, but
I really want some envelope follower modulation on the cutoff. What's
the simpliest / lowest part count design that produces acceptable
results? The one on René's page looks simple enough, but I want lower
parts count :-)

I'm to stupid to isolate the envelope follower in the DrQuack schematics... 

What if I try a fullwave rectifier with Harry Bisells Morph-Lag? Or am
I completely on the wrong track?

If it matters, the filter would be used for uhr, "general purpose
filtering", whatever that is. I guess I would be using it more on drum
parts or 'the mix' rather than single instruments.

/J