73s
Butch Bussen
wa0vjr

I'd try isolation transformers.  Rat shack should have what you need.  On 
Thu, 30 Aug 2007, Anthony Vece wrote:

> Hi Everyone;
>
> I am attempting to play my computer through my system.
>
> I am getting a low level hum.
>
> That's when I play it using the digital jack on the sound card.
>
> When I play it through one of the speaker jacks the hum is still there but,
> it's not as noticeable because the audio level is higher.
>
> When I turn the computer off, the hum disappears.
>
> When I boot up the computer, the hum is there even before windows comes up.
>
> Any ideas?
>
> 73 De Anthony W2AJV
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> ECHOLINK NODE NUMBER: 74389
>