[MPA] Sound Problem in 10.3.8

David DelMonte ddelmonte at mac.com
Tue Mar 8 02:37:56 PST 2005

Gregg, I think it did fix the problem  - but it is not fully 
satisfying. Yes, everything is plugged into the same outlet - in fact - 
to a UPS device (APC). But I also had to wiggle the audio cable (RCA) 
in order to get the buzz to stop.

Can you please explain a little about how a ground loop happens?


ps. I of course swapped audio cables. same experience.

On Mar 8, 2005, at 3:51 AM, Gregg Gorrie wrote:

> on 3/7/05 3:27 PM, Carol Stein at carol at carolstein.com wrote:
>> Thanks for taking the time to answer. I will check out the  circuit
>> situation
>> Carol
>>> It sounds like what you're experiencing is a ground loop. Make sure
>>> that
>>> everything in your computer system and your audio chain (interface,
>>> mixer,
>>> etc.) is using the same A.C. electrical circuit ... use one or more
>>> power
>>> bars if needed and have them all going to one plug-in at the end.
>>> Alternatively, if the M-Audio interface or any of your other audio
>>> equipment
>>> has a ground lift switch, lift the ground to see if that solves the
>>> problem.
>>> -- 
>>> Gregg
> No problem. Please let me know if this fixes your problem (both you and
> David).
> Carol, this solution should also include all of your video equipment 
> (ie
> camera, monitor, etc.) as well as the audio and computer equipment.
> -- 
> Gregg
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