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McCallister
McCallister
Trending Lyricist I
December 18, 2022

5.1 audio encoding problem on AMP.

Hi everyone, through an HDMI switch connected to AMP, I stream content from different sources to the TV, ps4, intel NUC 7th generation, satellite decoder and more.
When I use Netflix on the NUC, even though 5.1 audio is enabled in the PC audio settings, the PCM stereo audio format icon appears in the smartphone Sonos app.
One would think there might be an audio driver issue however if I connect the PC to the ARC, the data stream is recognized correctly and the PCM 5.1 icon appears on the app.
Could this be an AMP firmware issue?

Thanks

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17 replies

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Ken_Griffiths
Ken_Griffiths
December 20, 2022

Just tried with the notebook, nothing! At this point I think there may be some compatibility bug between AMP and Windows 10…

If I use PS4 as source, 5.1 audio is encoded correctly.

Others seem to have it working on Windows 10, but perhaps see if this link might assist you:

https://www.partitionwizard.com/partitionmagic/how-to-set-up-5-1-surround-sound-on-pc-win10.html

McCallister
McCallisterAuthor
Trending Lyricist I
December 20, 2022

Ken, everything is set up correctly :(

Ken_Griffiths
Ken_Griffiths
December 21, 2022

Ken, everything is set up correctly :(

When you had the Arc connected the Intel NUC, it was sending the audio ‘uncompressed’ to the Arc as multichannel LPCM - you need to get the Intel NUC (or your laptop) to transcode the audio-out to ‘compressed’ Dolby Digital 5.1 - so I’m guessing there is a setting somewhere to do that. The Amp will not handle uncompressed LPCM 5.1 audio as that codec requires eARC on the audio receiver, hence its falling back to PCM 2.0 stereo only.

So perhaps look for a setting to transcode the digital audio-out in your audio card driver settings to DD 5.1 or even DTS 5.1 in windows.

 

McCallister
McCallisterAuthor
Trending Lyricist I
December 23, 2022

Update: today I did some other tests with a laptop where win11 is installed. The situation has not changed even if many dolby codecs would be available. Audio coming from PC to AMP is always encoded to PCM stereo :(

 

Ken_Griffiths
Ken_Griffiths
December 23, 2022

Well it shows support for the DTS and Dolby Digital codecs, so you just need the Intel NUC/chosen App to play either one of those codecs, I suspect - I’m not sure though where in windows you change those settings. Perhaps someone who uses that device/OS might chime in and be able to assist you, or perhaps check with the Intel NUC community. See below link…

https://community.intel.com/t5/Intel-NUCs/NUC-11-audio-DTS-Dolby/m-p/1430741

Airgetlam
Airgetlam
December 23, 2022

You may want to double check the settings on your sound card as well, and not what appears to be, based on the image you’ve attached, the monitor itself. And potentially whatever player you’re using on Windows 11 might also impact the type of signal being sent to the sound card, which then would pass that on to the monitor/TV set. 

Because you’re using a PC, there’s a lot of things that can affect the signal type. most people tend not to use PCs as their source, but instead blueray players, cable boxes, satellite boxes, most of which also have (sometimes) sound settings, although many work with CEC, which the PC likely won’t. 

Bruce
McCallister
McCallisterAuthor
Trending Lyricist I
January 2, 2023

Happy New Year to all.

Problem solved by simply reinstalling the Netflix app again. Unbelievable... Thanks anyway for the support.

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