[sdiy] Re: Moog ADSR

[jhaible at t-online.de]

>   On my Mini I don't remember the effect being anywhere near this
> string.  It was noticable and useful as a performance feature but it
> wasn't really drastic.
>
> --
> David Evans   

> Minimoogs do have a "climbing" attack peak when Attack = 0 and 
Sustain <> 
> max. It's easy to hear on recordings, actually, try some old Rick 
Wakeman 
> with Yes or how about side 1 of the album "You" by Gong.
[...]
> - Gene

Thanks for your replies. So it was the Mini, not the Modular that shows
such an effect. I checked the schemos last night, and both EGs are
quite different, so I definitely made the wrong conclusion here.
I checked my circuit again, and I found the problem: my -6V regulation
was not strong enough. The integration cap on the Modular EG is 
connected 
to -6V (not to GND), so fast Attack times draw a lot of peak current
from the -6V supply. 
This will easily be cured with a LM337 instead of the simple opamp
I used. (I have local +12V / -6V regulation. The main supply is
a MOTM compatible +/-15V.)
But it was a nice effect. Maybe I should add a switch ...

JH.