Is it processor noise? if so, not much you can do with that except don't use 
onboard sound. usually add on sound cards help that. The CA-97 and AC-120 
onboard chips are some of the worst I've seen for that though what ever fell 
used on that computer at the career center where I used to go look for jobs, 
that had to be by far and away the worst it could possibly be even with 
headphones. If it's like a buzz, I'd use a different cable or better 
shielded cable.
Likely from what you describe, it's just the onboard sound, good headphones 
will let you hear it on them every time too, I can imagine with what you're 
doing it's probably worse though I find with a good add on sound card, 
usually, and I will stress *usually* they're cleaner.
----- Original Message ----- 
From: "Anthony Vece" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Thursday, August 30, 2007 7:28 PM
Subject: LOW LEVEL HUM!!!


> 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
> [log in to unmask]
> ECHOLINK NODE NUMBER: 74389