Can Displayport carry audio only?

slim01

slim01

slim01

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Hey all, quick question.

Can a Displayport to HDMI cable transmit audio only, in high quality 7.1/ATMOS from a GPU?

I had an rtx3080 with 2 HDMI's (1 to TV for video, and one to AVR receiver which Nvidia sees extended as a 2nd monitor at 640x480), but my new 5080 only has 1 HDMI.

Guessing maybe the cable supports audio only, but maybe the GPU can only send audio if it's with video also?

Note - I can't use passthrough on my TV.
Note 2 - I have HDMI on my mobo yes, but as HDMI can only send audio alongside a video signal not sure that's possible/wise.



CHEERS!
 
Curious if you managed to test this, as I'll be in a similar boat if my next GPU only has one HDMI port.
I've run DP to HDMI adapters succesfully in the past for video, so I imagine it would be fine to your AVR for audio?
 
trying today man, only just got the 5080 in. expect it will work horribly tbh.

I've recently taken my old soundcard out as wanted high res 7.1 over HDMI (was using optical but optical from the soundcards only support 5.1 pcm or compressed 5.1 dolby digital live which is ancient). I've been getting hella problems in pretty much every single game ive played.

horizon zero dawn -
1) very often game would run like dogsheet (5-10 fps and fps spikes). Also when it does this it sometimes switches to displaying 2 screens on my TV. flipping resolution sometimes works but often thats hard as it only shows like a quarter of the image.
2) cant tab to windows - somtimes can but seems to induce the issue above.
3) often blacks out my TV and have to unplug at the mains to reset.

they are billions:
1) if the tv ever goes into standby (as OLEDS like to do) or amp turns off (which it does when tv turns off) - game crashes when turning back on.
2) also cant tab to windows.

tomb raider
1) random crashes when changing settings that make my TV
2) can tab to windows but no audio when going back into game for some reason.

These issues could be TV related tbh - my tv is pretty glitchy: horizon point 3) seems suss.




before I never used to get these issues. I'll have a quick play but if get similar issues ill probs just switch back to 5.1 and the 15 year old sound card tbh, so much less hassle with DD live.
 
iostream said:
Curious if you managed to test this, as I'll be in a similar boat if my next GPU only has one HDMI port.
I've run DP to HDMI adapters succesfully in the past for video, so I imagine it would be fine to your AVR for audio?
Click to expand...
i'll reply so you get email :D
 
Last edited:
iostream said:
Curious if you managed to test this, as I'll be in a similar boat if my next GPU only has one HDMI port.
I've run DP to HDMI adapters succesfully in the past for video, so I imagine it would be fine to your AVR for audio?
Click to expand...
Hi mate, not entirely sure i can test this properly - didnt think before but as the cable I got is Displayport to HDMI, it's technically still an HDMI signal, meaning it needs to have both audio and video to even function.
Interestingly, on the nvidia control panel, it shows the connection type as hdmi not displayport (so shows 2x display port - empty, and 2 x HDMI 1 - 1 for TV and 1 for the virtual "display" of reciever )

but everything works before as it did, various issues and all

Hope that helps man
 
Thanks for the reply - certainly some odd problems you listed in your July 10th post!

I know if your first post you mentioned 'I can't use pass through on my TV', could you elaborate on that?

Assuming the TV is the one in your signature (Philips 55OLED706), I can see it has eARC functionality on HDMI port #2.
So if you plug your PC directly into your TV via HDMI port #1, and then run a second HDMI cable from TV HDMI port #2 to your AVR's output HDMI (not one of the inputs, confusingly enough), would that solve the issue?

I had a similar setup a while ago. If memory serves, the last thing you need to do is check the audio settings in the TV to make sure it outputs via eARC instead of using inbuilt speakers. Oh and finally, check the AVR settings, you need to enable ARC. Might be under HDMI somewhere...

If you've tried all that, and that's why you mention you can't use pass through, then ignore the above :)
 
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