I have the preliminary front panels available and will put them on our
website together with some explaining text during the next few days. I have
to point out that it is not 100% sure that the switched capacitor filter
will be manufactured. The SCF seems a bit boring to me. From my point of
view there is no need for this additional filter. But we could manufacture
this filter if there is a minimum quantity of orders (e.g. at least 25).

For the new QVCO module the situation is different. We received the last
batch of CEM3382 from Paul Schreiber/MOTM last week. It is used as QVCO in
the existing A-126. I expect that these will last until about middle of
2006. After this we will have to find a new solution. Probably the A-126
will be divided into two modules: the main frequency shifter (A-126-1 ) and
the external QVCO (A-126-2 ). The external QVCO will be much better than
the existing CEM based VCO (e.g. frequency down to less than 0.5 Hz with
exponential control, thru-zero feature in the linear control mode). In
addition there will be a switch in the final module that allows to select
between VCO and VCF (the sine output becomes lowpass and the cosine output
band pass). After all the QVCO is nothing but a self-resonating 12dB VCF
that is optimized for constant output level (usually the output level of a
filter in self-oscillation depends less or more upon the frequency). But the
QVCO cannot be used only to control the frequency shifter but even as a
thru-zero sine/cosine oscillator or 12dB LP/BP filter. We will also offer an
option that allows to use the QVCO in combination with an already existing
A-126. For this the CEM3382 will have to be replaced by an 8 pin IC
connector with flat cable that comes from the new QVCO. With an A-175 dual
voltage inverter the four phase quadrature outputs (0, 90, 180, 270 degrees)
are possible (0 degrees = sine, 90 degrees = cosine, 180 degrees = inverted
sine, 270 degrees = inverted cosine). With the A-135 VC mixer and the
morphing controller A-144 quad panning functions can be realized.

I wish you all a Merry Christmas and all the best for the new year.
Dieter Doepfer

> -----Ursprüngliche Nachricht-----
> Von: Doepfer_a100@yahoogroups.com
> [mailto: Doepfer_a100@yahoogroups.com ]Im Auftrag von selfoscillate
> Gesendet: Dienstag, 20. Dezember 2005 15:47
> An: Doepfer_a100@yahoogroups.com
> Betreff: 1 Re: high precision adder
>
>
>
> hello bakis,
>
> afaik there is no webpage for the forthcoming stuff yet.
> i guess the pages will be updated in january.
>
> best wishes
>
> ingo
>
>
>
> --- In Doepfer_a100@yahoogroups.com , Bakis Sirros
> <synth_freak_2000@y...> wrote:
> >
> > great news dieter.
> > any webpages for the forthcoming thru-zero VCO and the
> > switched-capacitor filter
> > best regards,
> > bakis.
> >
> >
> >
> >
> > --- Dieter Doepfer <hardware@d...> wrote:
> >
> > > For this I'd recommend another approach: Usage of
> > > several voltage reference
> > > sources (e.g. TL431) with adjustable output
> > > voltages. For adjustment (e.g.
> > > 1.00V, 2.00V ...) I'd recommend 25-turn precision
> > > trimming potentiometers.
> > > This avoids the need of 0.1% resistors with the
> > > right values. The TL431 data
> > > sheet can be found in the internet.
> > >
> > > Best regards
> > > Dieter Doepfer
> > > Doepfer Musikelektronik GmbH
> > > Email address: hardware@d...
> > > Web Site: www.doepfer.com
> > >
> > > P.S. we have been working hard during the last few
> > > days. Now I can confirm
> > > that these devices will be shown at NAMM (provided
> > > that they do not get lost
> > > during shipment ...):
> > >
> > > A-101-9 Universal Vactrol Module with some examples
> > > (probably A-143-1,
> > > A-162)
> > > A-188-1A 1024 stages BBD
> > > A-188-1B 2048 stages BBD
> > > A-1 Switched Capacitor Filter
> > > A-1 Quadrature Thru-Zero VCO / 12dB VCF, can be
> > > switched between lin/log
> > > control and between VCF (12dB LP/BP) and Sine/Cosine
> > > VCO
> > > CTM relay board
> > > MTC relay board
> > > d3c
> > > (and maybe TKB Version 2, but we are not sure if it
> > > will work in USA with
> > > 115V/60Hz as we use the hum noise induced by the
> > > mains leads to the human
> > > body and that much different for 115V/60Hz compared
> > > to 230V/50Hz)
> > >
> > >
> > > > -----Ursprüngliche Nachricht-----
> > > > Von: Doepfer_a100@yahoogroups.com
> > > > [mailto: Doepfer_a100@yahoogroups.com ]Im Auftrag
> > > von n keller
> > > > Gesendet: Montag, 19. Dezember 2005 22:17
> > > > An: Doepfer_a100@yahoogroups.com
> > > > Betreff: RE: 1 Re: high precision
> > > adder
> > > >
> > > >
> > > > 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@y...>
> > > > >Reply-To: Doepfer_a100@yahoogroups.com
> > > > >To: Doepfer_a100@yahoogroups.com
> > > > >Subject: 1 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
> > > > > >
> > > > > > > -----Ursprüngliche 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: 1 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
> > >
> > === message truncated ===
> >
> >
> > Bakis Sirros - Parallel Worlds
> > 1 group owner
> > http://www.parallel-worlds-music.com
> > http://www.shimarecords.co.uk
> > http://www.rubber.gr
> > Athens-Greece
> >
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