PC Graphics

londonjazzccat

I have a HP Pavilion Laptop and have also posted this question to the HP community.

My Denon AVR-X4200W is attached via HDMI.

In Windows 11 I can not get bitstreaming ( audio pass through ) to work.

I can now confirm that it works in Windows 10.

I set up my Laptop to be dual Win 10 and Win 11 boot.

At first, Windows 10 could not even see my Denon AVR and only had stereo speakers as an option with no supported encoded formats.

I ran the HP driver update utility but it told me everything was already up to date.

I then downloaded the update utility from AMD which did find my 470M graphics and installed a new driver for it. After reboot, my Denon AVR was listed with all the typical supported encoded formats. HDMI pass through worked.

I then went back to my Windows 11 and tried running the AMD update utility there. Unfortunately it was not a magic fix there because it says the graphics driver is up to date.

So, I now know that the HP HDMI and AMD graphics can pass through high definition audio. It seems likely to be a Windows 11 driver problem that stops the HDMI bit streaming audio in Windows 11.

I have tried every version of Windows 11 AMD High Definition Audio driver I can find;

10.0.0.24 ( from Microsoft, surprising to find a Win 11 driver that version )

10.0.0.30

10.0.0.38

I have also tried the generic Windows high definition audio driver.

londonjazzccat

Thank you Racer14 for the reply but my control panel settings are set to stereo. I do not enable Dolby Atmos/ DTSX / 7.1 or even 5.1 there because there is no need to with audio passthrough. With either 5.1 or 7.1 selected, the audio is sent as "multi channel in" to the AVR, not straight pass through of the encoded format. I also do not want to select either Atmos or DTSX because they both have the PC processing the sound and sending it to the AVR - if Atmos is selected then everything appears on the AVR as Atmos whether is it actually Atmos or not.

Setting to stereo is where the bitstreaming / pass through should work. I have a 9.1 setup on my AVR and with bitstreaming now working properly it sees Atmos as Atmos, DTS:X as DTS:X, DTS-HD as DTS-HD etc and handles all the decoding to 9.1 itself. I need no DTS or Atmos codex driver installed on Windows at all.

Looking at the properties of the Denon AVR in Windows shows it has support for all the encoded formats it needs - DTS Audio, Dolby Digital Plus, DTS-HD, Dolby TrueHD, Dolby Digital. Both Atmos and DTS:X are included in those formats.

AVR set to stereo to allow audio pass through.AVR supports the necessary encoded formats without needing any codecs installed in Windows.

AVR now recognises the passed through signal instead of showing "PCR"AVR now recognises the passed through signal instead of showing "PCR"

Problem now Solved by re-installing Windows 11 and then running the AMD driver update tool.

I ran a test on the partition I had dual boot Windows 10 by overwriting that with Windows 11. Sure enough, audio pass through worked there so it seems my Windows 11 drivers were messed up.

I tried an in-place "update" of Windows 11 but that failed. I then tried an AMD driver installation with its "factory reset" option for the drivers, but that failed. So, I went for a reinstall of Windows 11. The AMD driver update tool has installed AMD High Definition Audio driver 10.0.0.38 which I already had installed but this time on a clean install it works.

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Racer14

Hi, I have a windows 11 full home theater setup with full Dolby Atmos/DTS-X sound, and it works fine. The one thing you did not mention is your control panel audio settings, there you can see all of your sound supported. If you do not see Dolby Atmos/ DTSX /7.1 /etc. support, it will not work. At that point you should Go to the DTS website and download the codex driver for them this also supports headphones so go in setting's after installing and change it. There is a small charge for it. Not sure if you have windows 11 pro if not upgrade (buy keycode only) to it. The home version sucks. Hope this helps I had the same problem before getting the dts codex.

londonjazzccat