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A Quick Fix for PC Surround Sound

CMetaphor

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I just recently remembered something important about PC audio, even on new installations: PC audio always defaults to stereo, even when connecting via HDMI or DP. That means that a lot of HTPCs out there are probably only able to output 2.0 stereo and the receivers only able to do Pro Logic -type surround at best. Apparently there is no audio equivalent of EDID, so PCs don't get (or ignore) what the receiver says is capable of supporting in terms of surround sound formats.

A quick way to correct this:
Control Panel (not the gear icon, type it out in the Start menu) -> Hardware and Sound -> Manage Audio Devices. From the Playback Tab (default / leftmost), click on your chosen audio output (HDMI in my case) then click Configure at the bottom left.

Now you'll get a pop-up window and the ability to chose what your PC can output (number of channels including subwoofer). You can test each surround speaker one at a time from this window to confirm your chosen output and also tell windows if any of the speakers are large or not (which actually means speakers that are "small" will have some bass cut out and "large" speakes will receive the full audio output range).

Note: Kodi settings do not affect the above! Ex: If the PC is in 2.0 bit Kodi's audio settings say 5.1, the receiver will only get 2.0. You need both the above and Kodi to use the same setting for true surround audio tracks to work.

I wasn't today days old, but I had forgotten this a while back. Imagine my surprise when I fixed this on an htpc and everything it played since actually sounds good (non- pro-logic virtual surround mediocrity).

Hope this helps others out. 👍🤘
 

lowfat

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The problem I have is that the configured Speaker Setup reverts to stereo all the time. Not sure who to blame, Nvidia, my TV or my AVR. But the displays get 'refreshed' when the AVR turns on. And the HDMI audio device shows as 2 different speakers depending on whether the AVR is on or not. Which may cause it to reset back to stereo, iunno. I'm still 2.1 ATM until I finish my office so I haven't looked in to a fix yet. Maybe setup my Harmony remote to power on the AVR first, delay a couple seconds, then turn on the TV. So the PC always sees the AVR on.
 

CMetaphor

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@lowfat yeah PC last on & first off is the method I use on my home theater/htpc setups. Beyond that you might have bug somewhere, so check HDMI cable and try a different receiver if you've got one.
 

lowfat

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@lowfat yeah PC last on & first off is the method I use on my home theater/htpc setups. Beyond that you might have bug somewhere, so check HDMI cable and try a different receiver if you've got one.
It is the only receiver I have that support eARC, which is a requirement for multichannel on 3000 series or newer Nvidia cards.
 

CMetaphor

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It is the only receiver I have that support eARC, which is a requirement for multichannel on 3000 series or newer Nvidia cards.
Really? You can't get like DTS Master Audio or other universal 5.1 or 7.1 from a newer Nvidia? That seems like a big failing to me. I certainly hope I can get surround audio easily with Nvidia - I just bought a couple 10xx and 16xx gpus for my htpcs to handle 4k and higher.
 

lowfat

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Really? You can't get like DTS Master Audio or other universal 5.1 or 7.1 from a newer Nvidia? That seems like a big failing to me. I certainly hope I can get surround audio easily with Nvidia - I just bought a couple 10xx and 16xx gpus for my htpcs to handle 4k and higher.
Those should work as the source should pass-through, which would Bypass anything set in control panel (assuming you've checked dts, etc pass-through). But multi channel pxm requires an eARC capable tv and AVR.
 

JD

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Is that more of a Windows bug though? If you run Linux, or say, Libre Elec in the case of Kodi, I wonder if it's better behaved.
 

CMetaphor

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Is that more of a Windows bug though? If you run Linux, or say, Libre Elec in the case of Kodi, I wonder if it's better behaved.
Unsure, I don't run any Linux distros with more than default (stereo) audio. Because I've never searched for it I can't guess. Maybe a Linux guru would like to comment ? 🤷‍♂️
 

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