Does dvi to hdmi carry audio

[PanFriedPuppies]

So I just built a pc using a GTS 450 graphics card. I have it connected to my monitor through a dvi to hdmi cable. The monitor does not have built in speakers, but it does support audio because it has a separate attachable soundbar.
Today I was setting up some speakers and noticed that I could get pc audio through my monitor's soundbar. Apparently my graphics card is somehow pushing audio as well as video through to my monitor via a dvi to hdmi cable which I didn't think was possible.
Anyone mind clearing this up?
Is it the dvi hdmi cable or just my graphics card or both?..

 

[jaguarskx]

DVI does not carry audio signal at all.

 

[hunter315]

Some GPUs do support audio through their DVI ports if they sense its going into an HDMI cable even though it wouldnt be supported over a DVI cable, i guess they have to get a bit creative with the sensing and wiring inside to get it done.

 

[jaguarskx]

Can you provide a link to a video card that allows audio or DVI? I really do not think it possible based on well known specs of DVI.

The pins in a DVI port/cable are only designed to carry video signal. To be best of my knowledge audio signals cannot piggyback on top of video signals thru a DVI port.

 

[jithint]

Yes it is possible to send audio over a DVI->HDMI connection. I have an AMD HD4850 and use the adapter that came with the card. I think the DVI port is modified in some way.

check this thread for more info.

http://www.tomshardware.com/forum/257301-33-hdmi-adapter-audio-conundrum

 

[Snipergod87]

DVI does not carry audio signal at all.

It does work I know from experience, but the video card needs to have built in audio, and it needs to be selected as the audio playback device. I do not know if a 450 has that capability.

(My 4870, 4350 have audio over HDMI and DVI)

 

[PanFriedPuppies]

Well I guess my graphics card just supports audio through its dvi port but im using some random dvi to hdmi cable that I bought elsewhere.. So do all dvi - hdmi cables carry audio?

 

[Snipergod87]

Well I guess my graphics card just supports audio through its dvi port but im using some random dvi to hdmi cable that I bought elsewhere.. So do all dvi - hdmi cables carry audio?

That I am not sure. To be safe it would be best if the DVI cable had all the pins.