Doepfer

--- Dieter Doepfer <hardware@doepfer.de> wrote:
> From: "Dieter Doepfer" <hardware@doepfer.de>
> To: "Bakis Sirros" <synth_freak_2000@yahoo.com>
> Subject: AW: [Doepfer_a100] info from doepfer about
> the development of the   A107 and the A154.
> Date: Wed, 11 Jun 2003 10:59:40 +0200
> 
> > -----Urspr�ngliche Nachricht-----
> > Von: dasfonk@web.de [mailto:dasfonk@web.de]
> > Gesendet: Mittwoch, 11. Juni 2003 00:39
> > An: Doepfer_a100@yahoogroups.com
> > Betreff: Re: [Doepfer_a100] info from doepfer
> about the development of
> > the A107 and the A154.
> >
> >
> > hi,
> >
> > I�d rather like to see jumpers, so I can modify
> the A-154 and have my
> > own special unique custom version ;-)
> > Seriously, folks: I don�t see the point why
> Doepfer use jumpers so
> > often. Adding a switch isn�t that expensive and
> the users will
> > appreciate this. It makes a huge difference if you
> can just hit a rocker
> > switch or if you have to unscrew your module from
> the case, re-position
> > the jumper and mount the module back in the case.
> 
> It is always a problem to decide which
> functions/parameters of a module will
> be available as controls at the front panel. For
> jumpers it is obviously to
> the user that they could be replaced by switches at
> the front panel. But
> thats not the whole truth. There are a lot of other
> "hidden" functions that
> could be available as front panel controls too that
> have no jumpers on the
> pc board. The first modules we designed had no or
> only a few jumpers. But
> this does not mean that these modules do not contain
> "hidden" features. For
> newer modules we decided to add jumpers as they are
> extras withouts costs
> (the few cent will not change the final price) and
> enable the user to add
> functions that are not available for the standard
> module as - from our point
> of view - they are not that important. But of course
> it is a question of
> taste if a certain function makes sense.
> 
> If you are an electronic engineer and look at the
> schematics of a module you
> will find a lot of possible functions that could be
> added as controls at the
> front panel. E.g. you could short circuit or turn
> off certain electronic
> parts to modify the behaviour of a circuit, replace
> fixed resistors by
> potentiometers, add inputs and outputs and many
> more. But you have to find
> out which control element is worth to be available
> at the front panel.
> 
> E.g. for nearly each filter it would be possible to
> add outputs (e.g. each
> filter stage) or inputs (feeding the audio signal to
> another point of the
> circuit). For an ADSR you could add a lot of outputs
> that e.g. tell you the
> duration of the attack or decay stage. One could add
> an bypass switch to
> each audio or CV processing module (we discussed
> this as we started the
> A-100 but decided to omit the bypass function as the
> shining examples from
> Moog and others did not have this feature).
> 
> You can start an endless discussion which
> features/inputs/outputs/controls
> make sense for a certain module. But we as a
> manufacturer have to find the
> compromise between
> features/price/controllability/width/date of
> availability
> and many other parameters. It will never be able to
> satisfy all users and I
> know that we have to live with that problem. This is
> why I think that
> something like the DIY page is a good idea (.... OK,
> I know the momentary
> stage if far from beeing useful but it is still a
> non-official page and only
> made known to the Yahoo group).
> 
> Regards
> Dieter Doepfer
> 
> 
> 


=====
synthfreak(parallel worlds)
athens-greece
[Doepfer_a100] group owner

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hi.
Yes, the hidden functions. Like the linear FM and the soft sync inputs 
on the A-110 board.
As far as I remember Florian Anwander once wrote that one has to add a 
few resistors and jacks to make these features work, but I´m a lousy 
electronic engineer. The DIY page with detailed instructions would be a 
great help.

bye,
Paul

--- Dieter Doepfer <hardware@doepfer.de> wrote:

But thats not the whole truth. There are a lot of other "hidden" 
functions that could be available as front panel controls too that have 
no jumpers on the pc board.