hi Bakis, thanks a lot for the info. i think this a nice solution. it
gives the option to the end user to configure the inputs for the cv
in's of a module. i also like the jumpers idea, if you want more than
1 set of inputs and attenuators, say one set for the frequency cv in
and one for the resonance cv in, for a module. also the ability to
configure the number of inputs and attenuators differently, to
accommodate for different functions is a nice bonus. all in all, a
truly modular approach. Kudos.

regards,
RM

--- In Doepfer_a100@y..., bakis Sirros <synth_freak_2000@y...> wrote:
>
> --- Dieter Doepfer <hardware@d...> wrote:
> > From: "Dieter Doepfer" <hardware@d...>
> > To: "bakis Sirros" <synth_freak_2000@y...>
> > Subject: AW: 1 Re: the updated a107
> > link!!!
> > Date: Mon, 18 Nov 2002 18:01:18 +0100
> >
> > There is always a discussion how many CV inputs with
> > and without attenuators
> > should be available for a certain function of a
> > module. We discuss this matter
> > since many months (or even years) and one solution
> > would be the following: We
> > could manufacture a passive module with e.g. 5 input
> > sockets with attenuators
> > that could be used to extend the control input of an
> > existing module. Nearly
> > each voltage controlled parameter of the modules has
> > a so-called summing node
> > available (for experts: inverting input of the
> > summing operational amplifier
> > with vurtual GND level). This node is used to add up
> > all control voltages for
> > the function (e.g. for the A-111 VCO the 1V/oct
> > input, the manual coarse and
> > fine tune, the octave switch and the CV input with
> > attenuator). It would be
> > possible to add more CVs to this summing node. All
> > we had to do is to publish
> > the summing nodes for all modules. The output of the
> > new passive extension
> > module would have to be soldered to the summing node
> > of the module in question.
> > With different jumpers available at the passive
> > extension module it would be
> > possible to divide the 5 inputs and attenuators so
> > that they could be used
> > together (i.e. 5 inputs for one parameter) or
> > divided as desired (e.g. 3+3 or
> > 4+1 or even 1+1+1+1+1). If someone is familiar with
> > electronics of course he
> > could do this extension himself (simply one jack
> > socket + potentiometer +
> > resistor required).
> >
> > How about this solution that would work nearly for
> > each voltage controlled
> > parameter of the A-100
> >
> > Dieter Doepfer
> >
> >
> >
> >
> > > -----Ursprüngliche Nachricht-----
> > > Von: bakis Sirros
> > 2
> > > Gesendet am: Montag, 18. November 2002 14:55
> > > An: dieter doepfer
> > > Betreff: Fwd: 1 Re: the updated a107
> > link!!!
> > >
> > >
> > > --- ringmod45 <ringmod45@y...> wrote:
> > > > To: Doepfer_a100@y...
> > > > From: "ringmod45" <ringmod45@y...>
> > > > Date: Mon, 18 Nov 2002 01:44:21 -0000
> > > > Subject: 1 Re: the updated a107
> > link!!!
> > > >
> > > >
> > > > hi Bakis,
> > > >
> > > > the feature set for the module is amazing, it is
> > > > very good
> > > > considering the price. the layout of the A107
> > module
> > > > is very packed
> > > > and well laid out. however, one little niggle,
> > there
> > > > is only one
> > > > input and pot for the frequency in on the
> > module.
> > > > these are the
> > > > results from the poll concerning the issue of
> > the
> > > > frequency input and
> > > > pots.
> > > >
> > > > would you like to have an extra Voltage Control
> > > > Input with an
> > > > Attenuator (i.e. one fixed input and two inputs
> > > > with Attenuators
> > > > like the A120) 17 14.41% that's 17 out of 19
> > > > voters.
> > > >
> > > > i think there should be at least one dedicated
> > > > 1v/oct input and then
> > > > at least one variable input jack and pot added
> > to
> > > > the module. this
> > > > would add value to the module not having to buy
> > a
> > > > mixer for the
> > > > frequency input. if this the final layout for
> > the
> > > > module, you will
> > > > need a mixer to have an extra modulation to
> > control
> > > > the frequency
> > > > input. also if you need to have a precise 1v/oct
> > > > modulation source at
> > > > the frequency input and say an lfo as well,
> > would
> > > > this compromise the
> > > > 1 v/oct source, if mixed together with a linear
> > > > mixer
> > > >
> > > > anyone Mr.Doepfer
> > > >
> > > > Regards,
> > > > RM
> > > >
> > > >
> > > > --- In Doepfer_a100@y..., bakis Sirros
> > > > <synth_freak_2000@y...> wrote:
> > > > > hi list,
> > > > > check out the updated a107 link!!it containes
> > the
> > > > pic
> > > > > of the a107!!and some additional features,too!
> > > > > bakis.
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > > > =====
> > > > > synthfreak(parallel worlds)
> > > > > athens-greece
> > > > > 1 group owner-moderator
> > > > >
> > > > >
> > __________________________________________________
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> > >
> > >
> > > =====
> > > synthfreak(parallel worlds)
> > > athens-greece
> > > 1 group owner-moderator
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>
>
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