Anthony,

Check your sound card's manual.  Some cards try to sense what is connected 
to the digital output and adjust accordingly.  Of course, it may be that you 
just have lots of crosstalk on that jack, and the analog audio is leaking 
through.  You should also hear some digital hash from that output.

Steve

----- Original Message ----- 
From: "Anthony Vece" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Thursday, August 30, 2007 20:53
Subject: Re: LOW LEVEL HUM!!!


> Hi Steve;
>
> You bring up a good point.
>
> I am running the digital output into a analog connection.
>
> Believe it or not, the digital output from the computer's sound card had a
> mini jack.
>
> It's a creative live sound blaster card.
>
> Anthony
>
>
> ----- Original Message ----- 
> From: "Steve Dresser" <[log in to unmask]>
> To: <[log in to unmask]>
> Sent: Thursday, August 30, 2007 8:44 PM
> Subject: Re: LOW LEVEL HUM!!!
>
>
>> 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
>>>
>>>
>>>
>>
>
>
>