Doepfer

I would like a module with some precision constants available, perhaps a 
4HP module with CV Source outputs for precise whole numbers like 
-3,-2,-1,1,2,3,4,5VDC.  I'm guessing this is a very simple module to make, 
like some of the other recent suggestions.  I think it would be useful in my 
system, especially if a precision adder was, .....well, added.

  Perhaps someone can make a suggestion on how to slap one of these together 
and I'll make one up.  Let's see.....we've got 12V right on the rails.   
I've got my A-180 style faceplate and sockets.  Is it a simple matter of 
connecting -12V or 12V through the "correct" 0.1% resistor to each socket, 
or should I buffer the -/+12 through a dual op-amp in the 1Xamplifier 
configuration as shown on Doepfer DIY page before branching off through the 
0.1% resistors??   Can anyone with a workbench find some resistor values and 
post them?

nick


>From: "selfoscillate" <synaptic_music@yahoo.com>
>Reply-To: Doepfer_a100@yahoogroups.com
>To: Doepfer_a100@yahoogroups.com
>Subject: [Doepfer_a100] Re: high precision adder?
>Date: Mon, 19 Dec 2005 13:42:46 -0000
>
>
>hello dieter,
>
>with the right amount of jacks this module would close a real gap
>in the a100 module range. what i always wanted is a buffered
>version of an a180 and a precision adder could be used that
>way too, if it had enough jacks.
>
>how about three inputs, four buffered outputs and one
>inverted output? could be done on a 4 te faceplate.
>if you manufacture a module with similar specs, then
>i'll buy a minimum of six modules for my system right away.
>
>best wishes
>
>ingo
>
>
>
>
>--- In Doepfer_a100@yahoogroups.com, "Dieter Doepfer" <hardware@d...>
>wrote:
> >
> > An precision adder is from the technical point of view no problem
>(nothing
> > but the CV mixer on the DIY page but without attenuators and
>precision 0.1%
> > resistors and high quality OpAmps). If there are sufficient
>inquiries we
> > could develop such a module. How about a poll ?
> >
> > Best wishes
> > Dieter Doepfer
> >
> > > -----Urspr�ngliche Nachricht-----
> > > Von: Doepfer_a100@yahoogroups.com
> > > [mailto:Doepfer_a100@yahoogroups.com]Im Auftrag von okiikahuna
> > > Gesendet: Samstag, 17. Dezember 2005 23:16
> > > An: Doepfer_a100@yahoogroups.com
> > > Betreff: [Doepfer_a100] Re: high precision adder?
> > >
> > >
> > > Ingo,
> > >
> > > I think that this is an absolute necessity. It could also serve
>as a
> > > buffer, since the CV output of some modules, like the midi to CV
> > > module, drops if fed into too many oscilators and filters and
>such.
> > >
> > > There are not a lot of good alternatives out there: Analogue
> > > Solutions makes an 8hp CV mixer that is completely unusable for
>this
> > > purpose because it is WAY too imprecise. (don't bother trying it,
>I
> > > already have)  The Analogue Systems Buffer is much more precise,
>but
> > > you can't mix more than one voltage.   The Doepfer Buss Access
>mixes
> > > and buffer, but still not enough inputs.  So, there is a real need
> > > for this.
> > >
> > > It could be made as a 4hp module, since all you would need are
> > > inputs and outputs. (don't need precision if you are gonna screw
>it
> > > up with pots anyway) An inverting output might be nice.
> > >
> > > K
> > >
> > >
> > > --- In Doepfer_a100@yahoogroups.com, "selfoscillate"
> > > <synaptic_music@y...> wrote:
> > > >
> > > >
> > > > hello list,
> > > >
> > > > what would you guys think about a high precision adder/mixer?
> > > > such a module is very useful for adding pitch voltages
> > > > for vco's. standard mixers are just not precise enough
> > > > and so they often screw a 1v/oct quantized voltage.
> > > >
> > > > best wishes
> > > >
> > > > ingo
> > > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > > Yahoo! Groups Links
> > >
> > >
> > >
> > >
> > >
> > >
> >
>
>
>
>
>

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