ADSR circuit

[Barry Klein 714-932-7493]

The diode may be a good idea, depends on your normal settings of the 
Release pot.  If it was set to zero then you would be discharging
C1 for the "high" duration of the C2/R15 pulse.  But higher settings
would lessen the noticeability of the "glitch" as the RC pulse is so
short.  And I suppose there are those that would say "wow, that little
glitch is cool! don't change it!"  

I looked through my stuff and found that this circuit originally
appeared, without the gate/trigger conditioning, and in fact without
trigger Anything, in an EDN or whatever design note.  I added the
trigger input, conditioning, and all the diodes etc.  

So, I'd probably add the diode.

klein_b at a1.wdc.com