Doepfer

if you are in the US try one of those cheap plug adapters from 3 ends
to two  on your computer's power cable plug, (so the 3rd circular ends
up removed from the equation) this solved a problem I had before with
my laptop causing ground noise. but might be more of a temporary
solution. I just don't use the laptop anymore :)      


Carlos.

--- In Doepfer_a100@yahoogroups.com, "Anwander, Florian"
<Florian.Anwander@...> wrote:
>
> Hi
> 
> we had similar problems last week within a large live setup. Around 15 
> musicians with computers, lots of synths and softsynth, all mixed to 
> submixers, which are led to a main mix. The lenght of the power and 
> audio cables are 6 meters for the most musicians at least.
> 
> Though this sounds like a bunch of humm traps the most participians do 
> not have real problems, but two guys:
> Finally we could track down that these two are using
USB-Audiointerfaces 
> where the interfaces are powered by the USB port, not by an external 
> supply. This means that you have the dirty ground of the digital domain 
> as audioground.
> 
> Our solution now was simply to forbid this type of audiointerfaces.
> 
> Florian
> 
> stuadh wrote:
> 
> > Hi,
> > 
> >   I would like to appeal to anyone with experience in eradicating a
> > probable ground loop.  I've just done a bit of upgrading in my studio,
> > and I've developed a nasty buzzing in my system.  I've narrowed it
> > down to the interplay between Logic 7 and my analogue synth.  Of note
> > is that I have not changed anything inside the synth since before the
> > upgrade and that the problem exists even when the synth is turned off
> > but not when it is unplugged from the wall.  In fact, I've just been
> > jiggling about with the plug and the buzz come back as soon as the
> > earth pin of the plug makes contact.
> > 
> >   The problem also only exists when Logic is running but not when i
> > run things like iTunes etc.  It can also be controlled by the mixer;
> > turning down the channel volume or EQing it out work.  I've also gone
> > around turning off and unplugging everything except the computer,
> > synth and mixer, but the buzz remains.
> > 
> > Can anyone help?
> > 
> > Yours Aye
> > 
> > Stuadh
> > 
> > 
> > 
> >  
> > Yahoo! Groups Links
> > 
> > 
> > 
> > 
> 
> -- 
> Florian Anwander                  |ConSol
> Tel.   +49(89)45841-133           |Consulting&Solutions Software GmbH
> Fax    +49(89)45841-111           |Franziskanerstr. 38, D-81669 München
> email: florian.anwander@... |http://www.consol.de
>