[LAU] Behringer and Linux

[Fons Adriaensen]

On Tue, Mar 31, 2015 at 01:46:40PM -0500, Chris Caudle wrote:
> On Tue, March 31, 2015 12:36 pm, Patrick Shirkey wrote:
> > That person might not have much money but they might have the time to
> > figure out where the buzz comes from and do something productive. Who
> > knows they might even be able to provide useful feedback to Behringer that
> > improves their Linux solutions.
> >
> > Sounds like everything else on the board was working ok so a little bit of
> > hum should be relatively easy to solve. Maybe it just needs some contact
> > spray.
> 
> That type of problem is indicative of poor circuit reference conductor
> routing (colloquially called "ground loop" or "pin 1 problem") and can
> sometimes be improved with judicious use of added wire or copper foil tape
> connections, but often requires a new and proper PCB layout to correct. 
> It is basically just sloppy layout work by the design team.

Right. And in cheap mixers like this one, everything including connectors,
pots and switches will be on a single PCB, and there's no way to change
anything much unless you decide to drill some holes in it. 

And BTW, it was not 'a little bit of hum' but a ot of it, and new
equipment should't need contact spray (and it won't help for this 
kind of problem either).

Ciao,

-- 
FA

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