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Re: A-136 CV question

2003-05-04 by Joe Buechler

Timothy, you're not the only one who needs to correct himself five 
minutes after posting :-)

That's how long it took me, adjusting the voltage from an A176 CV 
Source, and watching the LEDs on an A170, to convince myself that the 
A136 does indeed process the A, +A, and -A paths independently, and 
then sums the result. My A132 suggestion was all wet.

If nothing else, I've learned a little bit more about the A136 today.

Joe

--- In Doepfer_a100@yahoogroups.com, "Joe Buechler" <buechlerjoe@t...> 
wrote:
> Timothy, the A136 User's manual says that the signal is split into 
> three parts, but no signal flow diagram is provided. (This is only 
> the least of the problems with the A136 documentation). The 
> signal diagram on the module front panel suggests that the "A" gain 
> is applied BEFORE the signal is fed to the positive and negative 
> clipping circuits. That's why I made the suggestion that I did.
> 
> I suppose I could spend some time experimenting to determine the 
> actual signal path, but it's a tedious business without a scope. I 
> wish bakis would nudge Dieter to describe the A136 signal path, and 
> correct all the errors in the User's Guide while he's at it.
> 
> Joe
> 
> --- In Doepfer_a100@yahoogroups.com, "Tim Stinchcombe" 
<timothy@t...> 
> wrote:
> > Hi Joe,
> > 
> > > If the positive/negative gain isn't an issue, couldn't you just 
> > route 
> > > the audio thru an A132 VCA and get voltage control of the gain 
> that 
> > > way?
> > 
> > Internally in the A-136 the signal is split into three paths, and 
> > the 'A' gain knob affects just one of these, and it's the 
> interaction 
> > of this path with the other two that produces all the interesting 
> > waveshaping effects. I suspect that doing what you suggest just 
> > probably wouldn't be so interesting.
> > 
> > Tim

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