[LAU] Realtek ALC882D

[Daniel Garmendia]

I have made two graphs of the hums frequency content (via some Matlab
wizardry).  The "zoomedout.jpg" shows most of the frequencies in the
signal.  The "zoomedin.jpg" shows that 60 Hz is by far the loudest
frequency.  Interpret as you please.

http://www.prism.gatech.edu/~gtg601q/LAU/zoomedout.jpg
http://www.prism.gatech.edu/~gtg601q/LAU/zoomedin.jpg

-DanielG

On 7/30/07, linux-audio-user-request at lists.linuxaudio.org <
linux-audio-user-request at lists.linuxaudio.org> wrote:
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> I have been told that this is probably caused by the power distribution
> circuitry within the laptop: it does not separate earth ground from "signal"
> (I'm assuming USB signal since my audio interface is USB) ground. The buzz
> certainly sounds more like "computer" noise than 60 cycle hum.
>
>
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