FW: [sdiy] AD/AR (was: AR Gen, sans the A)

[Ian Fritz]

Funny, I just posted a schematic for my design on electro-music.com
http://electro-music.com/forum/viewtopic.php?t=21723


At 09:11 AM 11/13/2007, gregory zifcak wrote:

>oops, meant to send this to the list:
>
>on a related note, i've been thinking about modifying the AR on my Arp 
>Odyssey to switch to AD mode. anyone ever done this, or know of an AD/AR 
>schematic i can look at for reference?
>
>thanks,
>greg
>
> > Date: Sun, 11 Nov 2007 14:11:24 -0800
> > From: tim.parkhurst at gmail.com
> > To: lightburnx at yahoo.com
> > Subject: Re: [sdiy] AR Gen, sans the A
> > CC: synth-diy at dropmix.xs4all.nl
> >
> > Hey Kyle,
> >
> > I would probably try replacing the attack pot with a 1K resistor
> > (rather than a short), as you would want to limit the current going
> > through the steering diodes seen in most AR generators. Another trick
> > you might try is simply differentiating and buffering a gate pulse,
> > and adding a variable resistor to the differentiator (to allow varying
> > the release time). Thomas Henry shows a circuit like this in the
> > Electronic Drum Cookbook, and it works really well. I'll send you a
> > picture of the schematic if you want.
> >
> > Tim (another trick) Servo
> >
> >
> > On Nov 10, 2007 9:38 PM, Kyle Stephens  wrote:
> >> Ahoy...
> >>
> >> I'm looking to make a release-only envelope - as the
> >> subject says, an AR generator without the attack
> >> component.
> >>
> >> Could I do this by taking an existing AR design and
> >> shorting out the attack time pot, thus theoretically
> >> making the attack time zero?
> >>
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