PC S-Video Out to Receiver = Horrible Buzz...Please Help?
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Posted by Magna Mater on January 30, 2005, 7:26 am
Please log in for more thread options I just recently tried to hook up my PC video card (old GeForce2 MX) to my receiver (Outlaw 1050) using the S-Video out. Whenever I plug the S-Video cable from my PC video card to my receiver (using the "Video 1" input (entirely inactive, including the RCAs)), I get a horrible and very loud buzzing sound through my speakers. The buzz is on all channels: AUX, Video-1, Video-2, DVD, etc. It's at a constant volume no matter how I adjust the knob unless I turn it to zero, at which point it disappears altogether. The picture works fine--I get Windows 2000 on the TV screen. I already have my PC sound card hooked up to the receiver using a digital coax-to-digital optical converter, assigning the digital input to the AUX channel. This has worked well for a couple of years now. My cables are short with no coils. Why the buzz? Any help would be appreciated here. MMM | |||||||||||||
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Posted by DaveW on January 30, 2005, 5:52 pm
Please log in for more thread options It sounds like you have a "ground loop" now in your system caused by the PC system and your HiFi system being at different relative ground levels. You may need to install a 'ground isolation transformer' in the circuit. -- DaveW | |||||||||||||
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Posted by Magna Mater on February 3, 2005, 4:45 am
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DaveW wrote: >It sounds like you have a "ground loop" now in your system caused by the PC
Thanks...you nailed it! I did have a ground loop problem which I managed
>system and your HiFi system being at different relative ground levels. You >may need to install a 'ground isolation transformer' in the circuit. > > > to pinpoint to the cable antenna. I built an easy antenna cable isolator with a pair of 75 to 300 ohm transformers. Cost under eight bucks at Radio Shack to fix the problem and better yet, since I have digital cable--no signal loss! MMM | |||||||||||||
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Posted by John Lewis on February 1, 2005, 12:08 am
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On Sun, 30 Jan 2005 04:26:02 -0500, Magna Mater >I just recently tried to hook up my PC video card (old GeForce2 MX) to
>my receiver (Outlaw 1050) using the S-Video out. > >Whenever I plug the S-Video cable from my PC video card to my receiver >(using the "Video 1" input (entirely inactive, including the RCAs)), I >get a horrible and very loud buzzing sound through my speakers. > Not surprising, since your PC video card has no audio circuitry, only video. Apparently you are feeding video signal to your receiver and your are hearing the frame-rate buzz. You need a separate audio card ( or motherboard audio ) in your PC from which you feed the audio to the receiver...as you have done already. John Lewis >The buzz is on all channels: AUX, Video-1, Video-2, DVD, etc. It's at a
>constant volume no matter how I adjust the knob unless I turn it to >zero, at which point it disappears altogether. > >The picture works fine--I get Windows 2000 on the TV screen. I already >have my PC sound card hooked up to the receiver using a digital >coax-to-digital optical converter, assigning the digital input to the >AUX channel. This has worked well for a couple of years now. > >My cables are short with no coils. > >Why the buzz? Any help would be appreciated here. > >MMM | |||||||||||||
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>receiver (Outlaw 1050) using the S-Video out.
>
> Whenever I plug the S-Video cable from my PC video card to my receiver
> (using the "Video 1" input (entirely inactive, including the RCAs)), I get
> a horrible and very loud buzzing sound through my speakers.
>
> The buzz is on all channels: AUX, Video-1, Video-2, DVD, etc. It's at a
> constant volume no matter how I adjust the knob unless I turn it to zero,
> at which point it disappears altogether.
>
> The picture works fine--I get Windows 2000 on the TV screen. I already
> have my PC sound card hooked up to the receiver using a digital
> coax-to-digital optical converter, assigning the digital input to the AUX
> channel. This has worked well for a couple of years now.
>
> My cables are short with no coils.
>
> Why the buzz? Any help would be appreciated here.
>
> MMM