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Dual Universal Slope Generator Question

2001-03-19 by jhaible@t-online.de

Hi,

this is my first post to the list.

I have a question about the Dual Universal Slope Generator.
I understand that can work as a linear slew function with unity
gain (thus forming a linear AR envelope of 5V when a 5V
gate is fed in its input), or as a AD envelope when a trigger
is fed into the trigger input. (And the LFO applications with
feedback applied, of course).
Now the question is: What is the peak voltage in "trigger" (AD)
mode ? Is it constant ?
What if both, an input signal and a trigger are applied ?
Will the peak output voltage be determined by both input voltages ?

JH.

Re: Dual Universal Slope Generator Question

2001-03-20 by John Papiewski

Oh, what a great question!

Here's what I found:

In "AD" mode (just triggered) the peak is ~ 5.5 v. And it varies a little
from module to module.
If you apply both a signal in and a trigger, strange things happen:
1. if the bias signal in is 0-5.5 v, the output voltage will rise to the
module's normal peak.
2. if it's > 5.5 v, no change is observed
3. if it's < 0 v but > ~ -3.5 v, the voltage rises from the negative bias to
5.5 v
4. if it's < ~ -3.5 v, it stays on till the bias voltage goes over -3.5v. In
other words, no release.

Amazing, there seems to be no end of interest in these things.

John P.

jhaible@... wrote:

Show quoted textHide quoted text

> Hi,
>
> this is my first post to the list.
>
> I have a question about the Dual Universal Slope Generator.
> I understand that can work as a linear slew function with unity
> gain (thus forming a linear AR envelope of 5V when a 5V
> gate is fed in its input), or as a AD envelope when a trigger
> is fed into the trigger input. (And the LFO applications with
> feedback applied, of course).
> Now the question is: What is the peak voltage in "trigger" (AD)
> mode ? Is it constant ?
> What if both, an input signal and a trigger are applied ?
> Will the peak output voltage be determined by both input voltages ?
>
> JH.
>
>
> 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/

Re: Dual Universal Slope Generator Question

2001-03-20 by John Papiewski

ps... just thinking some more...
... so I would imagine that if you use the DSG as an oscillator, you could
actually crudely gate the signal with a positive bias.... oscillator and
crappy distorted VCA all in one!!!

John P.

Re: Dual Universal Slope Generator Question

2001-03-20 by John Papiewski

Urf... damn. Doesn't work that way... more investigation needed.

John Papiewski wrote:

Show quoted textHide quoted text

> ps... just thinking some more...
> ... so I would imagine that if you use the DSG as an oscillator, you could
> actually crudely gate the signal with a positive bias.... oscillator and
> crappy distorted VCA all in one!!!

Re: Dual Universal Slope Generator Question

2001-03-20 by jhaible@t-online.de

> Oh, what a great question!

What a great and detailled answer - Thank you !

JH.

> In "AD" mode (just triggered) the peak is ~ 5.5 v. And it varies a little
> from module to module.
> If you apply both a signal in and a trigger, strange things happen:
> 1. if the bias signal in is 0-5.5 v, the output voltage will rise to the
> module's normal peak.
> 2. if it's > 5.5 v, no change is observed
> 3. if it's < 0 v but > ~ -3.5 v, the voltage rises from the negative bias

> 5.5 v
> 4. if it's < ~ -3.5 v, it stays on till the bias voltage goes over -3.5v.

> other words, no release.
>
> Amazing, there seems to be no end of interest in these things.