Anthony,

I'm assuming your amplifier doesn't have digital inputs, so you probably 
want to use an analog output from your sound card.  An analog output would 
be either the speaker output or the line output if your card has one.  If 
your card doesn't have separate jacks, you may be able to select the type of 
output either from the Windows Volume Control, or from the sound card's own 
control panel which may or may not be easy to access.

Your hum problem is probably the result of a ground loop caused by one or 
more pieces of equipment not sharing a common ground.  If your amplifier has 
a non-polarized power cord, try reversing the plug to see if the hum goes 
away.  If you can't do that, or it doesn't work, try running a piece of wire 
between the amplifier's case and the case of the computer.  I assume you're 
using shielded cable between the sound card and the amplifier, and that 
you're also using a high level input such as CD or Tuner, and not a 
low-level input such as Phono.

If none of these suggestions work, I'm afraid you'll either have to live 
with the hum, or try using a different sound card.  Good luck.

Steve

----- Original Message ----- 
From: "Anthony Vece" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Thursday, August 30, 2007 19:28
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
>
>
>