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No USB C Audio Unless I use my HDMI Port on PC

E

edo101

Gawd
Joined
Jul 16, 2018
Messages
559
Hi all, I have a Gigabyte X870E AORUS ELITE WIFI7 ICE. It comes with two USB 4 Display port video. The motherboard also has a HDMI audio but sadly it taps out at Dolby Atmos. I can't get DTS-X on it like I would if I plugged my Q990F soundbar to my graphics card.

I would plug in my Q990F to my RTX 4090 but the 4090 can only handle 3 displays which I already have. So I figured I try USB 4 with a USB C to HDMI cable. The USB 4 when plugged in shows me DTS-X and Dolby Atmos on my Windows sound settings but selecting either of these two options won't give me any sound to my soundbar. The only way I get sound is when I select default Windows sound profile with no spatial sound so no DTS-X or Dolby Atmos.

The one weird work around I discovered is that I have to plug in a display to my Motherboard's HDMI port as well to get my USB 4 port to play audio in Atmos or DTS-X. But it defeats the purpose because I want my displays all and only on my graphics card and the soundbar to use my USB 4 port. I'd like to not have two inputs from my PC going into one display. Any idea why this is happening and what I can do to fix it?
 
when using the usb 4 does it show the licenses as active?

1781056545811.png
 
pendragon1 said:
k. the usb and hdmi audio must be tied, when theres no video output the audio dumbs down. i wonder if one of these would work to keep the dtsx/atmos enabled.
https://www.amazon.com/Emulator-Headless-Compatible-Computer-fit-Headless/dp/B09P6DKF28
Click to expand...
Woah, bro, what is that? Looks interesting but what is it? And its a little funny you say the "needs a video output" because the Q990F does show up as a display. I can change the resolution. But I guess it somehow knows it's not a monitor? Idk.
 
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its a fake monitor contained in an hdmi dongle(?). they are usually used for remote desktop access where theres no monitor connected. it will keep the hdmi port outputting a display signal so that the audio will work, hopefully.
 
edo101 said:
Woah, bro, what is that? Looks interesting but what is it?
Click to expand...

These things are basically dummy displays. Has an edid rom to say its a display, might do whatever else to sync, and drops the bitstream on the floor.

Can be super handy for convincing computers to do what you want, when what you want isn't mainstream.
 
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