[mythtv-users] Audio - hiss (Buzz)

[Brian Wood]

On Mar 14, 2006, at 7:05 PM, Scott Croft wrote:

> On Mar 12, 2006, at 8:01 PM, Scott Croft wrote:
>
>
>
>
> Yes it is more of a Buzz/hum and not a hiss, I guess I did not use  
> the right
> audio term!
>
> The hum is not present at all until one of two things happen.  I
> short/ground the left or right channel going to the line in, or I  
> plug the
> sound card line in to the TV card line out with the patch cable.   
> After
> reading and asking question I agree with you that when I touch or  
> ground the
> line in I should here the buzz.  The problem is that I get the same  
> results
> when I connect the TV card to the line in on the onboard audio  
> (also get the
> TV audio).  Both left and right channels have the buzz.
>
> I think that I tried the mixer settings you describe (think I read  
> something
> to the same effect) and could not get any sound at all with  
> settings like
> that.  Not sure about this.
>
> Since my last mail I have added a PCI sound card and disabled the  
> onboard
> audio in the bios.  This works with no trouble.  Not the solution I  
> wanted,
> but it works.  I am using all the same settings and hardware with the
> exception of the onboard audio.  I guess this tells me that my  
> brand new
> onboard audio is broken, or I have some type of grounding problem  
> with the
> PC??
>
> Again thanks for the input, it is much appreciated.  I am moving on  
> to get
> the remote control working, and the s-video output to fill my  
> entire TV
> screen.
>

Are you using the same patch cord from the cap card output to the  
audio input ?? It's possible that you have a bad cable, actually more  
likely than a bad mobo sound setup.

Are you sure that you pushed the cable into the on-board input and  
the cap card output firmly ??

Are you sure you were using the proper connectors (ie: 3-conductor  
connectors at both ends, not a 3-c to 2-c cable).

Are you sure you were going into a "line in" on the mobo and not a  
"mic in" ??

All of the above could result in the symptoms you describe.