Analogue systems

I suggest emailing Doepfer.  Please let us know what they say!

On 8/16/07, ilanode <techmeier@web.de> wrote:
>
>   --- In analogue_systems@yahoogroups.com<analogue_systems%40yahoogroups.com>,
> "Tom Remi Flygel"
> <tom-rf@...> wrote:
> >
> > But that's what crosstalk does as a term in electronics.
>
> Sure, I'm aware of this. Since a modular synth ought to be designed to
> minimize cross talk, I don't think the prob. is the design itself.
> Personally I never experienced this with my Doepfer VCOs nor ever
> heared about similiar issues.
>
>
> When two telephone cables with improper isolation are lying next to
> eachother, the signal will "jump" over to the other cable. This is why
> you could sometimes listen to other people's conversations when you
> were having a phonecall. There doesn't have to be any kind of
> connection between the two, as long as they're badly isolated the
> signal's electromagnetism might affect the cable next to it. I think
> that's what's happening here.
> >
> > ----- Original Message -----
> > From: ilanode
> > To: analogue_systems@yahoogroups.com<analogue_systems%40yahoogroups.com>
> > Sent: Thursday, August 16, 2007 10:33 AM
> > Subject: [analogue_systems] Re: RS15 rack crosstalk between
> doepfer modules
> >
> >
> > The Doepfer power connector has 16 pins - 2 of them belong to the
> > CV-bus on the power distributing board. If ASys follows Dopefer's pin
> > out with their RS15 power sockets this would explain how a CV can
> > spread without a patchcord. Mind you, it's still strange since you
> > actually should have to connect a CV to one of the 4 VCOs to controll
> > all of them via the CV-bus...
> >
> > BTW On the Doepfer bus boards are jumpers to (dis-)connect the CV bus.
> >
> > --- In analogue_systems@yahoogroups.com<analogue_systems%40yahoogroups.com>,
> "TacocaT" <zpardos@> wrote:
> > >
> > > Well I have four of them and I don't want any of them near the power
> > > supply. So I don't think that's an option. However, can you please
> > > inform me theoretically as to how the signal could be passing
> from one
> > > module to another without patch cables.
> > >
> > > Thanks
> > >
> > > --- In analogue_systems@yahoogroups.com<analogue_systems%40yahoogroups.com>,
> alex banks
> > > <alexander.banks@> wrote:
> > > >
> > > > Try moving the VCOs apart?
> > > >
> > > >
> > > > On 15 Aug 2007, at 14:38, TacocaT wrote:
> > > >
> > > > > Actually I have not yet installed my VCA. If I plug my
> headphones
> > > > > directly into the output of one VCO I can faintly hear the
> pitch of
> > > > > the second VCO if I, say, do a frequency sweep with the POT
> of the
> > > > > second VCO. What would be allowing the signal from the second
> > VCO to
> > > > > leak into the output of the first VCO? I am not using ANY
> > patches for
> > > > > this.
> > > > >
> > > > > thanks
> > > > >
> > > > > --- In analogue_systems@yahoogroups.com<analogue_systems%40yahoogroups.com>,
> "monroeeskew"
> > > > > <monroe.eskew@> wrote:
> > > > > >
> > > > > > That is strange. The modules are independent and don't pass
> > signals
> > > > > > through the power supply. Is the one VCO still connected to a
> > > VCA or
> > > > > > mixer while you do this? Perhaps the VCA/mixer is not
> completely
> > > > > > attenuating when it should be, so you may need to adjust a
> > trimpot
> > > > > on it.
> > > > > >
> > > > > > One thing I have noticed is that no matter how much I
> adjust my
> > > ASys
> > > > > > VCA or the volume CV on my keyboard, the signals cannot be
> 100%
> > > > > > attenuated and can still be heard very faintly if I turn
> up my
> > > > > speaker
> > > > > > loud enough. I can tolerate this though.
> > > > > >
> > > > > > --- In analogue_systems@yahoogroups.com<analogue_systems%40yahoogroups.com>,
> "TacocaT" <zpardos@>
> > > wrote:
> > > > > > >
> > > > > > > Hello,
> > > > > > >
> > > > > > > I just recieved my rs15 case and I put a couple of doepfer
> > style
> > > > > VCOs
> > > > > > > into th case and I can hear one VCO's output (faintly)
> > > through the
> > > > > > > other's output (no patches). This shouldn't be happening.
> > Does it
> > > > > > > happen for anyone else? Is there also crosstalk when
> using the
> > > > > ASys
> > > > > > > power connectors?
> > > > > > >
> > > > > > > I wonder if the doepfer racks have this problem at all.
> > > > > > >
> > > > > >
> > > > >
> > > > >
> > > > >
> > > >
> > > > [Non-text portions of this message have been removed]
> > > >
> > >
> >
> >
> >
> >
> >
> >
> >
> ----------------------------------------------------------
> >
> >
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> >
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> >
>
>  
>


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