Thank you. I was losing my mind trying to figure this out. I never would have figured this out.
This worked immediately.
Youāre welcome, now if only plex would do something to fix thatā¦
Out of curiosity, does anyone know what the licensing restrictions are that seem to be preventing plex from addressing this issue?
Is it possible weāll never get a fix due to the licensing?
Still broken despite a recent update. They are going to have to address this as more and more of their user base upgrade to 24h2
And because you need to re-fix it every time you update the client 
Yeah, as said before you can avoid that by putting the .dll as read only, it will avoid it being replaced by plex installer
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Could it be to do with this? Iām suffering the same issue BTW.
A note on AC-3 (āDolby Digitalā)
AC-3 is an audio codec that supports multi-channel (āsurround soundā) audio. Itās also known as Dolby Digital.
On versions of Windows prior to Windows 11, version 24H2, the AC-3 codec is included.
Beginning with Windows 11, version 24H2, the AC-3 codec is no longer included with Windows. However, many device manufacturers will pre-install an AC-3 codec. Also, if you upgrade to Windows 11, version 24H2 from an earlier version of Windows, the AC-3 codec will be retained. In these cases, you will still be able to play files encoded with the AC-3 audio codec.
As far as i can remember it was everything Dolby related. Audio and Video.
Video is difficult due to libplacebo and Dolby Vision decoding and audio is a different story.
mpv (the playback engine used) does not decode the Dolby audio stuff. Plex uses the EasyAudioEncoder from Dolby to decode the audio. It could probably also be a bug in that part of the software, then Dolby would need to fix it and Plex would only need to roll out that update.
With a swapped dll thatās not a problem, because it does not rely on EasyAudioEncoder.
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This is a problem for me as well. Adding my voice to the pile.
Same problem as everyone else @OttoKerner why has this not been resolved since 24H2 is now a public release with more and more people updating? Seems like our money isnt being well spent?
Garbage support. They have been told a problem and the fix, and yet ads are more important
Is there an update on this? I also just installed Windows 11 and plex audio is not working.
Same issue on same windows build
Updated to Windows 11 24H2. Right after this update EAC on plex desktop software stopped working. This fixed it. Thank you.
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Thank you do much , this worked like a charm and for the love of god couldnāt get it working until I seen this post
Adding my name to the pile, had two computers update to 24H2 and now no audio, come on Plex, get this sorted!
Have you had any feedback from the team? This is going to be a huge issue soon as 24H2 rolls out to everyone.
Adding my voice to the choir. Could not get any audio from Plex Desktop app for files that had E-AC3 audio after a fresh install of Windows 11. The linked updated mpv dll resolved that for me.
I will say formerg might be on to something, though. The built in Windows Media Player also fails to play audio from the same E-AC3 mkv files. After driving myself nuts for a while, I installed VLC to test it. VLC has no such problem and plays the audio fine.
Microsoft Support:
AC-3 is an audio codec that supports multi-channel (āsurround soundā) audio. Itās also known as Dolby Digital.
On versions of Windows prior to Windows 11, version 24H2, the AC-3 codec is included.
This is not so much a problem with Plex, but a mess of communication in the industry when it comes to evolving codecs. I believe I have found a solution to the issue which was posted. Took me a day to find it scouring the web,
The problem
Beginning with Windows 11, version 24H2, the AC-3 codec is no longer included with Windows. However, many device manufacturers will pre-install an AC-3 codec. Also, if you upgrade to Windows 11, version 24H2 from an earlier version of Windows, the AC-3 codec will be retained. In these cases, you will still be able to play files encoded with the AC-3 audio codec.
The solution
Microsoft Dolby Digital Atmos Pack version 10.0.22621.4317
- Microsoft Dolby Digital Atmos Pack standalone installer.
Link to this wonderful individuals work.
Release AnWave 2024 Split Feature Release Ā· SimonMacer/AnWave Ā· GitHub
Link to download the driver install.
Microsoft.Dolby.Digital.Atmos.Pack-v10.0.22621.4317-20241013.zip
I hope this makes everyone happy, it did me. There is some other cool things there if you explore.
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Thanks for listing another way to fix this, however, Plex need to speak up on this, as thereās going to be a lot of users out there suddenly unable to hear anything, there must be a solution Plex can push out.
