CGS utility Envelope Generator

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andrewF
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CGS utility Envelope Generator

Post by andrewF » Mon Sep 20, 2010 6:42 am

:party:
http://www.cgs.synth.net/modules/cgs78_env.html
Finally a good use for my bag of 2M pots!!

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Adam-V
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Post by Adam-V » Mon Sep 20, 2010 7:09 am

Santa comes through again!!!

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Post by unintentional states » Mon Sep 20, 2010 8:07 am

Good to know one of the only basic modules missing from the CGS catalog is no longer as such. This should secure Ken's ever expanding monopoly on my system.

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Dego
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Post by Dego » Mon Sep 20, 2010 8:09 am

Great Ken! :party:

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gwaidan
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Post by gwaidan » Mon Sep 20, 2010 8:33 am

Looks excellent! Love the splittable board-I can see this going behind a panel in my Euro system very soon!!! :bananaguitar:

Only question-does anybody know where there to find a good source of 2M log pots? I'm looking for them for another project as well, and no-one seems to have made them for years :sadbanana: I was seriously thinking of series-cascading the individual gangs of a dual gang 1M log pot, but would rather not if I had a choice...

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Neutron7
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Post by Neutron7 » Mon Sep 20, 2010 8:35 am

It says you can change a capacitor and use 1M pots instead. I expect a lot of people will have to do that!

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the bad producer
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Post by the bad producer » Mon Sep 20, 2010 9:37 am

Bearing in mind that most pots have 20% tolerance, wouldn't 2M2 be okay? These are pretty easy to get hold of, at least they are here in the UK...

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Post by sduck » Mon Sep 20, 2010 10:01 am

Very nice! If I didn't already have 4 motm 800 eg's I'd probably get at least one of these.

I like the gate led being built into the circuit - but wish there was one tracking the output. I suppose it'd be easy enough to add on.
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gwaidan
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Post by gwaidan » Mon Sep 20, 2010 7:40 pm

the bad producer wrote:Bearing in mind that most pots have 20% tolerance, wouldn't 2M2 be okay? These are pretty easy to get hold of, at least they are here in the UK...
Thanks for that-found heaps of them. Guess I wasn't looking widely enough...

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Neutron7
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Post by Neutron7 » Mon Sep 20, 2010 8:15 pm

I think if you build say 4 of these on one panel(2 boards worth) and put an inverter after the attack gate outs, you could use it to trigger the next envelope after the current one has finished attack cycle, and make a sort of ratchet or freehand short trigger sequencer. (as well as interesting envelope shapes)

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pugix
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Post by pugix » Mon Sep 20, 2010 9:46 pm

Wow! What a great addition to CGS. :sb:

Let's see I only have 4 MOTM-800, 2 Blacet 2070, 4 Oakley ADSR/VCA, 2 Mattson EG, and just about to add a quad Mattson ADR. Ponder, ponder.... YES, I have to build this too! I can't help myself. :despair:
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Post by valis » Mon Sep 20, 2010 10:26 pm

Fan-freaking-tastic. This looks like a nice, simple, utility module. Well done Ken. I do believe in Santa.

In all seriousness, I love Ken's designs and his approach to synthesis. His pcbs are nice and affordable and his shipping is insanely cheap (plus I get to know what he's had for breakfast). Anyway, thanks Ken. I know dealing with the public can be draining. Thanks for sticking around. There's a lot of us with the absurdly awesome synths that wouldn't of been possible without you.

You rock. Don't ever change.. :bananaguitar:

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otherunicorn
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Post by otherunicorn » Wed Sep 29, 2010 6:01 am

the bad producer wrote:Bearing in mind that most pots have 20% tolerance, wouldn't 2M2 be okay? These are pretty easy to get hold of, at least they are here in the UK...
Of course 2M2 would be okay. So would 2M5. If people settled on one standard it would be so nice!
The standard I usually use is 1, 2, 5. I think another standard is 1, 2.2, 4.9. And so on it goes.

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Funky40
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Re: CGS utility Envelope Generator

Post by Funky40 » Wed Sep 29, 2010 10:40 am

andrewF wrote::party:
http://www.cgs.synth.net/modules/cgs78_env.html
RL LED current 33k for modern high-brightness LEDs. 1k for standard LEDs.
guess thats then3K3, not 33K.
nice tip, my LEDs are usually much to bright.

looking forward to hear feedbacks how you guys like it

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otherunicorn
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Re: CGS utility Envelope Generator

Post by otherunicorn » Wed Sep 29, 2010 5:50 pm

Funky40 wrote:
andrewF wrote::party:
http://www.cgs.synth.net/modules/cgs78_env.html
RL LED current 33k for modern high-brightness LEDs. 1k for standard LEDs.
guess thats then3K3, not 33K.
nice tip, my LEDs are usually much to bright.

looking forward to hear feedbacks how you guys like it
33k NOT 3k3. They need extremely little current.

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Funky40
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Post by Funky40 » Sun Oct 03, 2010 1:18 pm

thanks to clearify my confusion

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Post by terrafractyl » Wed Oct 06, 2010 6:15 am

awesome news. going to make one for sure
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Post by zthee » Wed Oct 06, 2010 6:40 am

I think I'll probably build one :)

Dead easy to make a Serge style panel of as well! Might have to include it on some future panel.

So, stupid question; Looping attack pulse out to retrig in - will this make it into a ramp LFO?
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otherunicorn
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Post by otherunicorn » Wed Oct 06, 2010 4:55 pm

zthee wrote:So, stupid question; Looping attack pulse out to retrig in - will this make it into a ramp LFO?
No.
If you invert the attack pulse externally, and feed it to gate in, you might get something.

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Post by TOPLEL » Fri Jan 18, 2019 11:04 am

Mine have some slight voltage (about 100-200mV) on the output while a gate signal is present even when i turn the Sustain pot all the way down.
I trimmed it to like 2mV offset when there is no gate signal.

Is this normal?

I don't like this remaining voltage because it is enough to open my VCA slightly.

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Post by tardishead » Thu Nov 28, 2019 5:23 am

ummm unless I have got a component severely out of spec these are very short envelopes - is that right? I built 2 boards for a total of 4 ADSR generators. Even with doubling the timing capacitor I am only getting max 5 seconds release. Is it intended to be that short? The CGS mail list no longer exists apparently

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