MXR envelope follower..?how works?

[Sean Costello]

Paul Perry wrote:
> 
> At 12:24 PM 29/11/98 -0600,
> a number of people kindly informed me that the hex invertor can be
> used as a linear amp, that the world is round etc.
> But, this isn't the mystery.....
> The mystery is, how do you make an envelope follower wah with
> 6 amplifiers, a couple diodes, two CMOS switches.

Well, have you tried looking to see if the hex invertors are used as a
linear amp? ;)

Anyway, is there any possibility that the diodes are acting as
voltage-controlled resistors?  Otherwise, I got no clue. 

Sean Costello