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General discussion

DVI to HDMI No Audio

Feb 4, 2009 11:03AM PST

I have a Samsung LN-T4066F I hooked up a PC with a DVI port to HDMI port. I have no Audio, I have seen something about video cards putting out an audio signal and I have updated the Driver for the video card Nvidia GeForce 8800 GS. Any suggestions???? Thanks in advance

Discussion is locked

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Check your video card specs
Feb 4, 2009 12:15PM PST

I don't think the nvidia 8800 gs supports audio over HDMI, at least I don't see it as a spec listed on nvidia's site. You'll notice for the 9600, for example, that they list HDMI audio as a feature (though it's only passthru SPDIF).

For example, see this post on nvidia's forums:
http://forums.nvidia.com/lofiversion/index.php?t45880.html

I guess it's a good excuse to upgrade, if you really want audio over HDMI... but you can just run a separate audio cable too Happy.

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DVI has no audio
Feb 4, 2009 12:32PM PST

DVI has no audio on it.

HDMI is a superset of DVI, with the audio interleaved with the video. There are converters that will take a DVI signal and a SPDIF signal and generated an HDMI signal with the video and audio interleaved, and there are video cards with an HDMI port that will accept SPDIF digital audio from your motherboard and interlace the audio onto the HDMI signal, and there are video cards that have HDMI ports and on-board audio hardware, but a DVI video card won't magically grow audio just because you ran it through a DVI to HDMI adapter.

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Actually...
Feb 4, 2009 1:21PM PST

Actually, to make things even more confusing, there are video cards that, with a special DVI->HDMI adapter, can output audio from their "DVI" ports. Of course, these are non-standard...

My own video card, an ATI 2600xt is like this -- it has on-board sound hardware, but only DVI ports. Using the special DVI->HDMI adapter that came with the card, it can send audio over HDMI; using a generic adapter doesn't enable sound.

But anyway, the OP doesn't have a video card that has SPDIF passthru or on-board sound hardware.

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More info
Feb 4, 2009 8:56PM PST

Sorry, I did not give enough information. From the computer I have a DVI to HDMI apadter, then a HDMI cord going to the computer. I also have a headphone jack to RCA pluged in from the onbroad sound card to the TV. Both the HDMI and RCA are plugged into HDMI 1 on the TV and I have no sound? Thanks for the help, and sorry for only putting up half the problem.

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I think you have to use HDMI2
Feb 4, 2009 10:32PM PST

I think you have to use HDMI 2 in that case (I think that's the only port that will take external audio).