Cgs synth

The Electronic Peasant has a simple one:

http://www.electronicpeasant.com/projects/ssdrums/ssdrums.html

Look at the "Skin and Shell" schematic, the AD generator. I haven't
built it but it looks like it will hold a trigger high for as long as
the attack stage. Low parts count, too!

--- In cgs_synth@yahoogroups.com, Mark <yahoogroups@...> wrote:
>
>
> I think a simple AR envelope would be a good idea -- not just for
> drum sounds, but also for modulating filters, synced VCO's, etc.
>
> My modular is in MOTM format, so I'm thinking of a 1U module with
> four knobs and four jacks, having two AR envelopes, each with a
> trigger input and envelope output. Imho, having separate trigger and
> gate inputs is unnecessary.
>
> In order to make better use of gates, it could be designed that the
> envelope is held high as long as input is held high. That is the
> attack starts when the input goes high, and the release starts only
> after the input goes low (and the attack is finished). So it would
> produce full AR envelopes with short drum triggers as one would
> expect, but could also be controlled by using gates of different
> lengths. Also looping, cascading, and different gate/trigger logic
> (eg. the output always goes low when the input goes low, the envelope
> resets on a new leading edge, etc.) could easily be implemented with
> switched jacks and a couple of toggle switches, or hardwired
> according to individual preference.
>
> While I would need to look into this further, if a panel were
> available, this could probably be built using two MOTM-800 PCB's
> (which are $20 each). The problem would be getting decent 1M pots.
>
> On 11/8/07, thomas white put forth:
> >Ken,
> >
> >Not too sure what your thoughts would be on this
> >but... I have recently found the need for a simple
> >Attack/Decay or Attack/Release module to use with my
> >growing drum synth section of my modular. Have you
> >ever thought about making a simple pcb like this? I
> >was motivated to ask you after recently rediscovering
> >your bandpass filter pcb with the stacking nature and
> >pcb mounted pots. Anyway, thought I would put the
> >question out there to see what you would think. My
> >needs would be something like
> >
> >Attack Pot
> >Release Pot
> >Gate Input
> >Trigger Input
> >Envelope Out
> >Manual Trigger Button
> >LED for twinkly light folks
> >MTA-156 power connector as standard with most other
> >modules
> >
> >Of course, if you wanted to get really fancy you could
> >add a "end out" pulse like the burst generator so they
> >could be looped if you had multiple units. This would
> >need a 4th jack though (but worth it for me)
> >
> >Just my two cents. No other pcb manufacturer has
> >anything less than a full ADSR or VCADSR. I need to
> >save space as many out in the community now do. Anyone
> >else see a need for something like this?
> >
> >Thomas White
> > Natural Rhythm
> >www.naturalrhythmmusic.com
>