Synth-DIY Yahoo! Groups Archives

Thread

DUSG retriggering + how fast attack is

2003-10-20 by Fernando

Hi all,

I always heard that the DUSG can't be retriggered. I believe, it will
ignore a new trigger until completion of it's cycle when triggered
by it's Trigger input.

But, what if you feed trigger signals, or just short pulses, by it's
signal input (IN) ?
Say we have rise at fastest rate and fall at whatever and we feed
this fast pulses at it's IN. Won't we have a resulting shape
identical to what we could obtain by retriggering?
Please, someone try and tell us about!

Also, can someone measure how fast it's attack can be? Less
than a millisecond?

Thank you,

Fernando

Re: DUSG retriggering + how fast attack is

2003-10-23 by Fernando

err... there is no interest in this subject or it didn't make sense?

Re: DUSG retriggering + how fast attack is

2003-10-23 by John P

I'll have a crack at it.

It is pretty much what you said.
If instead of sending a pulse to the trig input you send a step trigger
to IN, then this will act like retriggering.. I don't think the
similiarity is perfect though. But if you have say fast attack &
moderate to long decay, re-triggering this way will work the way you want.

With longer attacks though there's some difference. If you retrigger
before the attack is done (with a medium to long decay) the output won't
restart at zero but will drop a little and retrace back to maximum,
because you're doing slew limiting with the DSG.

Hope that's not too confusing. The short answer is, it works ok.

As far as the speed of attack & decay times, I think the spec says if
it's patched as a vco it'll go > 1 khz. So the sum of attack & decay
time must be 1 ms or less, which means minimum attack time must be < 500
microseconds. If that ain't fast enuff for ya, I don't know....

Re: DUSG retriggering + how fast attack is

2003-10-23 by Fernando

Thanks a lot for your help John.
A new tip for that incredible device.

...a quote about the speed (from you!) :

>To: "analog(ue) heaven" analogue@...,
>From: John Papiewski johnp299792@...,
>Subject: Re: [AH] DSG - taking the bait....
>Date: Fri, 28 Feb 2003 08:37:12 -0600
>
>The catalog goes into several DSG functions pretty well:
>1. transient generator... send a trigger pulse to the DSG trig in,
>you get one linear rise and fall slope. The time range is from
>around 50 microsec to a minute or so ... with a cv bias you can
>go to several hours.

(...)

Great range!!!
I see that catalog is not online? It is posible to get one
somehow?

Thank you,

Fernando

Show quoted textHide quoted text

--- In SergeModular@yahoogroups.com, John P
<johnp299792@a...> wrote:

> I'll have a crack at it.
>
> It is pretty much what you said.
> If instead of sending a pulse to the trig input you send a step

trigger

> to IN, then this will act like retriggering.. I don't think the
> similiarity is perfect though. But if you have say fast attack &
> moderate to long decay, re-triggering this way will work the way

you want.

>
> With longer attacks though there's some difference. If you

retrigger

> before the attack is done (with a medium to long decay) the

output won't

> restart at zero but will drop a little and retrace back to

maximum,

> because you're doing slew limiting with the DSG.
>
> Hope that's not too confusing. The short answer is, it works

ok.

>
> As far as the speed of attack & decay times, I think the spec

says if

> it's patched as a vco it'll go > 1 khz. So the sum of attack &

decay

> time must be 1 ms or less, which means minimum attack time

must be < 500

> microseconds. If that ain't fast enuff for ya, I don't know....

Re: DUSG retriggering + how fast attack is

2003-10-23 by John P

You can get the printed catalog by calling Rex.
We're working on an online catalog but as they say in the deep-sea
salvage business, "don't hold your breath".

Fernando wrote:

Show quoted textHide quoted text

> Thanks a lot for your help John.
> A new tip for that incredible device.
>
> ...a quote about the speed (from you!) :
>
>
>>To: "analog(ue) heaven" analogue@...,
>>From: John Papiewski johnp299792@...,
>>Subject: Re: [AH] DSG - taking the bait....
>>Date: Fri, 28 Feb 2003 08:37:12 -0600
>>
>>The catalog goes into several DSG functions pretty well:
>>1. transient generator... send a trigger pulse to the DSG trig in,
>>you get one linear rise and fall slope. The time range is from
>>around 50 microsec to a minute or so ... with a cv bias you can
>>go to several hours.
>
> (...)
>
> Great range!!!
> I see that catalog is not online? It is posible to get one
> somehow?
>
> Thank you,
>
> Fernando
>
> --- In SergeModular@yahoogroups.com, John P
> <johnp299792@a...> wrote:
>
>>I'll have a crack at it.
>>
>>It is pretty much what you said.
>>If instead of sending a pulse to the trig input you send a step
>
> trigger
>
>>to IN, then this will act like retriggering.. I don't think the
>>similiarity is perfect though. But if you have say fast attack &
>>moderate to long decay, re-triggering this way will work the way
>
> you want.
>
>>With longer attacks though there's some difference. If you
>
> retrigger
>
>>before the attack is done (with a medium to long decay) the
>
> output won't
>
>> restart at zero but will drop a little and retrace back to
>
> maximum,
>
>>because you're doing slew limiting with the DSG.
>>
>>Hope that's not too confusing. The short answer is, it works
>
> ok.
>
>>As far as the speed of attack & decay times, I think the spec
>
> says if
>
>>it's patched as a vco it'll go > 1 khz. So the sum of attack &
>
> decay
>
>>time must be 1 ms or less, which means minimum attack time
>
> must be < 500
>
>>microseconds. If that ain't fast enuff for ya, I don't know....
>
>
>
>
> To unsubscribe from this group, send an email to:
> SergeModular-unsubscribe@yahoogroups.com
>
> Keep on Patchin'!
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>