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Thread
2007-08-15 by TacocaT
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.
2007-08-15 by monroeeskew
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, "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. >
2007-08-15 by TacocaT
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, "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, "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. > > >
2007-08-15 by TacocaT
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, 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, "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, "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] >
2007-08-15 by alex banks
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, "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, "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]
2007-08-16 by ilanode
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, "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, 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, "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, "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] > > >
2007-08-16 by nicholas_kent
I once had that problem. I installed a whole case worth of modules at once. I never found the culprit but I suspect something was not plugged in properly and other modules didn't like it. My advice which should answer some things is to not install everything at once. Try to install and test each new module one at a time or a few you don't think are a problem at a time. That way you can likely isolate exactly what dosen't like what. Maybe try the doepfer first alone? Perhaps just because I installed everything really slowly and carefully when I was done the second time everything worked perfectly.
2007-08-16 by ilanode
--- In analogue_systems@yahoogroups.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 > 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, "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, 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, "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, "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] > > > > > > > > > > > > ------------------------------------------------------------------------------ > > > No virus found in this incoming message. > Checked by AVG Free Edition. > Version: 7.5.484 / Virus Database: 269.11.19/955 - Release Date: 15.08.2007 16:55
> > > [Non-text portions of this message have been removed] >
2007-08-16 by Tom Remi Flygel
But that's what crosstalk does as a term in electronics. 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 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, "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, 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, "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, "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] > > > ------------------------------------------------------------------------------ No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.5.484 / Virus Database: 269.11.19/955 - Release Date: 15.08.2007 16:55 [Non-text portions of this message have been removed]
2007-08-16 by Monroe Eskew
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] > > > > > > > > > > > > > > > > > > > > > > ---------------------------------------------------------- > > > > > > No virus found in this incoming message. > > Checked by AVG Free Edition. > > Version: 7.5.484 / Virus Database: 269.11.19/955 - Release Date: > 15.08.2007 16:55 > > > > > > [Non-text portions of this message have been removed] > > > > > [Non-text portions of this message have been removed]
2007-08-16 by Bakis Sirros
yes, that is a good idea.
best regards,
Bakis.
--- Monroe Eskew <monroe.eskew@gmail.com> wrote:
> 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]
> > > > >
> > > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> >
>
----------------------------------------------------------
> > >
> > >
> > > No virus found in this incoming message.
> > > Checked by AVG Free Edition.
> > > Version: 7.5.484 / Virus Database: 269.11.19/955
> - Release Date:
> > 15.08.2007 16:55
> > >
> > >
> > > [Non-text portions of this message have been
> removed]
> > >
> >
> >
> >
>
>
> [Non-text portions of this message have been
> removed]
>
>
=== message truncated ===
Bakis Sirros - Parallel Worlds / Interconnected / Memory Geist
[Doepfer_a100] group owner
http://www.parallel-worlds-music.com
http://www.myspace.com/parallelworldsmusic
http://www.myspace.com/interconnectedmusic
http://www.myspace.com/memorygeist
http://www.DiN.org.uk
http://www.shimarecords.co.uk
http://www.rubber.gr
Athens-Greece
____________________________________________________________________________________
Take the Internet to Go: Yahoo!Go puts the Internet in your pocket: mail, news, photos & more.
http://mobile.yahoo.com/go?refer=1GNXIC2007-08-17 by TacocaT
Emailing Doepfer is an option but this is an Analogue Systems case. I'll send an email to ASys but I doubt the manufacturer's will reply with any new info. The crosstalk is faint enough I may just say it's part of the system's personality and maybe migrate the doepfer modules to a doepfer case when I accumulate enough. Other than this crosstalk issue, the modules seems to be working just fine in the case. I will also try installing one module at a time, starting with the two VCOs and see if they still exhibit this behavior. Thanks --- In analogue_systems@yahoogroups.com, Bakis Sirros <synth_freak_2000@...> wrote: > > yes, that is a good idea. > best regards, > Bakis. > > > --- Monroe Eskew <monroe.eskew@...> wrote: > > > I suggest emailing Doepfer. Please let us know what > > they say! > > > > On 8/16/07, ilanode <techmeier@...> 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] > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > ---------------------------------------------------------- > > > > > > > > > > > > No virus found in this incoming message. > > > > Checked by AVG Free Edition. > > > > Version: 7.5.484 / Virus Database: 269.11.19/955 > > - Release Date: > > > 15.08.2007 16:55 > > > > > > > > > > > > [Non-text portions of this message have been > > removed] > > > > > > > > > > > > > > > > > > > [Non-text portions of this message have been > > removed] > > > > > === message truncated === > > > Bakis Sirros - Parallel Worlds / Interconnected / Memory Geist > [Doepfer_a100] group owner > http://www.parallel-worlds-music.com > http://www.myspace.com/parallelworldsmusic > http://www.myspace.com/interconnectedmusic > http://www.myspace.com/memorygeist > http://www.DiN.org.uk > http://www.shimarecords.co.uk > http://www.rubber.gr > Athens-Greece > > > > ____________________________________________________________________________________ > Take the Internet to Go: Yahoo!Go puts the Internet in your pocket: mail, news, photos & more. > http://mobile.yahoo.com/go?refer=1GNXIC >
2007-08-17 by Tom Remi Flygel
No crosstalk here with only AS modules, at least (2 VCOs). Shouldn't be any with doepfer modules either, really..maybe a flaw in your case.
----- Original Message -----
From: TacocaT
To: analogue_systems@yahoogroups.com
Sent: Friday, August 17, 2007 9:33 AM
Subject: [analogue_systems] Re: RS15 rack crosstalk between doepfer modules
Emailing Doepfer is an option but this is an Analogue Systems case.
I'll send an email to ASys but I doubt the manufacturer's will reply
with any new info. The crosstalk is faint enough I may just say it's
part of the system's personality and maybe migrate the doepfer modules
to a doepfer case when I accumulate enough. Other than this crosstalk
issue, the modules seems to be working just fine in the case.
I will also try installing one module at a time, starting with the two
VCOs and see if they still exhibit this behavior.
Thanks
--- In analogue_systems@yahoogroups.com, Bakis Sirros
<synth_freak_2000@...> wrote:
>
> yes, that is a good idea.
> best regards,
> Bakis.
>
>
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No virus found in this incoming message.
Checked by AVG Free Edition.
Version: 7.5.484 / Virus Database: 269.12.0/957 - Release Date: 16.08.2007 13:46
[Non-text portions of this message have been removed]2007-08-17 by Monroe Eskew
I'm no expert but it sounds like the cause of the crosstalk is lack of proper isolation of the VCO's, the same phenomenon that can happen with telephone wires in close proximity. I'd guess that it's the VCOs' fault rather than the ASys case, which merely provides power. On 8/17/07, TacocaT <zpardos@yahoo.com> wrote: > > Emailing Doepfer is an option but this is an Analogue Systems case. > I'll send an email to ASys but I doubt the manufacturer's will reply > with any new info. The crosstalk is faint enough I may just say it's > part of the system's personality and maybe migrate the doepfer modules > to a doepfer case when I accumulate enough. Other than this crosstalk > issue, the modules seems to be working just fine in the case. > > I will also try installing one module at a time, starting with the two > VCOs and see if they still exhibit this behavior. > > Thanks > > --- In analogue_systems@yahoogroups.com<analogue_systems%40yahoogroups.com>, > Bakis Sirros > <synth_freak_2000@...> wrote: > > > > yes, that is a good idea. > > best regards, > > Bakis. > > > > > > --- Monroe Eskew <monroe.eskew@...> wrote: > > > > > I suggest emailing Doepfer. Please let us know what > > > they say! > > > > > > On 8/16/07, ilanode <techmeier@...> wrote: > > > > > > > > --- In > > > > > analogue_systems@yahoogroups.com <analogue_systems%40yahoogroups.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> > <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> > <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> > <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> > <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> > <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] > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > ---------------------------------------------------------- > > > > > > > > > > > > > > > No virus found in this incoming message. > > > > > Checked by AVG Free Edition. > > > > > Version: 7.5.484 / Virus Database: 269.11.19/955 > > > - Release Date: > > > > 15.08.2007 16:55 > > > > > > > > > > > > > > > [Non-text portions of this message have been > > > removed] > > > > > > > > > > > > > > > > > > > > > > > > > > [Non-text portions of this message have been > > > removed] > > > > > > > > === message truncated === > > > > > > Bakis Sirros - Parallel Worlds / Interconnected / Memory Geist > > [Doepfer_a100] group owner > > http://www.parallel-worlds-music.com > > http://www.myspace.com/parallelworldsmusic > > http://www.myspace.com/interconnectedmusic > > http://www.myspace.com/memorygeist > > http://www.DiN.org.uk > > http://www.shimarecords.co.uk > > http://www.rubber.gr > > Athens-Greece > > > > > > > > > __________________________________________________________ > > Take the Internet to Go: Yahoo!Go puts the Internet in your pocket: > mail, news, photos & more. > > http://mobile.yahoo.com/go?refer=1GNXIC > > > > > [Non-text portions of this message have been removed]
2007-08-24 by (i think you can figure that out)
It sounds like the ground is daisy-chained on the power buss board. Doing this opens the potential for the noise caused by one module to bleed down any module to it's right on the rack, and if severe enough, to every module in the system - even those powered by different PSUs It's especially prevalent with systems with a lot of LEDs unless a separate return line is run specifically for those grounds (ala Buchla, which is why he has a dedicated 'noisy' ground buss and partially why he went with an altogether different patchcord system for control voltages - it keeps the noise out fo the audio path). There are a few things you can try, two of which won't require modification. Please understand making electrical mods will void your warranty...so think twice before you do them!): 1. Try mounting the VCOs of the far left of the rack. This keeps the daisy chain short as possible 2. Move the PWM pot on the Doepfer VCOs so they fall silent (full positive or full negative) then have a listen again to see if it's still there. PWM circuits are hard on power supplies, if you don't do it right they will bleed into the return line which can be picked ff by other modules. Dieter's an excellent engineer, I'm sure he handled this correctly. 3) On the Doepfer VCOs yo will see two 10uf caps somewhere close to the power connector. Replace those with a larger value - something like 33 uf. Make sure the caps you put in there have 16 volt or higher voltage rating above or they'll blow about 10 seconds after power is applied. You;ll know when they do - it sonds like a firecracker and leaves paperpulp all over the PCBA and insdie of the rack. The module won't suffer any damage if this happens, but it's a pain to deal with. 4) Are you monitoring from the same module when you're hearing the noise? Is the same module going to the speakers? Have you trie monitoring form a different module? If you have one module you use fr your outputs, you may need to do the same cap replacmen on that one. 5) Another mod which will fix this is running the power to the module through a lowpass filter BEFORE that power goes the module itself. Not so easy retrofit however as you've got to insert this mod in right at the point the power comes into the board from the buss, before it goes anywhere int the module. What you do it calculate the maximum power consumption of the module and divide that by the voltage (in this instance, 12). This gives you the resistor value (this is OHMs law, btw). What you'll need to do it cut the line where the power leaves the connector and insert a series resistor there that's just a bit under the value you came up with in your calculation. I understand this is a pain - but it will fx the problem. 5) Although not at all practical, another thing you may want to try is running separate wires from the ground terminals on each of the module power connectors on the rack that's powering the VCOs and run all those lines directly to the ground tap of the rack's power supply. You won't have to cut the ground lines already there. If they are daisy chained together, this wil take take of it. hope this helps??? - P --- In analogue_systems@yahoogroups.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. >
2007-08-28 by TacocaT
Hey peter, thanks for the reply. Important things to note: The VCOs I am using are model 15s not doepfer brand vcos so the detailed instructions you gave will be confusing at best to apply to these. Also, I can hear the VCO "noise" from any jack of any module connected to the doepfer bus. I also have Asys modules installed and i can NOT hear any bleed through when monitoring those modules' jacks. Revealing observation? I want to say this is a problem with the Asys doepfer buss, but I haven't heard widespread accounts of this and if it is the problem then there should be a solution, as you are thankfully trying to persue. Any ticks I should try with the model 15s.. that is if you're at all familiar with them ;] -Zach --- In analogue_systems@yahoogroups.com, "(i think you can figure that out)" <peter@...> wrote:
> > > > It sounds like the ground is daisy-chained on the power buss board. > Doing this opens the potential for the noise caused by one module to > bleed down any module to it's right on the rack, and if severe enough, > to every module in the system - even those powered by different PSUs > It's especially prevalent with systems with a lot of LEDs unless a > separate return line is run specifically for those grounds (ala > Buchla, which is why he has a dedicated 'noisy' ground buss and > partially why he went with an altogether different patchcord system > for control voltages - it keeps the noise out fo the audio path). > > There are a few things you can try, two of which won't require > modification. Please understand making electrical mods will void your > warranty...so think twice before you do them!): > > 1. Try mounting the VCOs of the far left of the rack. This keeps the > daisy chain short as possible > > 2. Move the PWM pot on the Doepfer VCOs so they fall silent (full > positive or full negative) then have a listen again to see if it's > still there. PWM circuits are hard on power supplies, if you don't do > it right they will bleed into the return line which can be picked ff > by other modules. Dieter's an excellent engineer, I'm sure he handled > this correctly. > > 3) On the Doepfer VCOs yo will see two 10uf caps somewhere close to > the power connector. Replace those with a larger value - something > like 33 uf. Make sure the caps you put in there have 16 volt or > higher voltage rating above or they'll blow about 10 seconds after > power is applied. You;ll know when they do - it sonds like a > firecracker and leaves paperpulp all over the PCBA and insdie of the > rack. The module won't suffer any damage if this happens, but it's a > pain to deal with. > > 4) Are you monitoring from the same module when you're hearing the > noise? Is the same module going to the speakers? Have you trie > monitoring form a different module? If you have one module you use fr > your outputs, you may need to do the same cap replacmen on that one. > > 5) Another mod which will fix this is running the power to the module > through a lowpass filter BEFORE that power goes the module itself. > Not so easy retrofit however as you've got to insert this mod in right > at the point the power comes into the board from the buss, before it > goes anywhere int the module. What you do it calculate the maximum > power consumption of the module and divide that by the voltage (in > this instance, 12). This gives you the resistor value (this is OHMs > law, btw). What you'll need to do it cut the line where the power > leaves the connector and insert a series resistor there that's just a > bit under the value you came up with in your calculation. I > understand this is a pain - but it will fx the problem. > > 5) Although not at all practical, another thing you may want to try is > running separate wires from the ground terminals on each of the module > power connectors on the rack that's powering the VCOs and run all > those lines directly to the ground tap of the rack's power supply. > You won't have to cut the ground lines already there. If they are > daisy chained together, this wil take take of it. > > hope this helps??? > > > - P > > > > --- In analogue_systems@yahoogroups.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. > > >