System
- ASUS ROG Strix G531/GL531GT laptop
- Windows 11
- Plex Media Server is hosted on a separate desktop PC
- Laptop is accessing the server remotely
- General Windows audio works normally
Problem
Neither Plex for Windows nor Plex HTPC produces any audio during playback.
Video playback works normally. There are no buffering/playback failures; the native Plex clients simply produce no sound.
However, Plex Web in the browser works perfectly on the same laptop, accessing the same server and playing the same media files with working audio.
This strongly isolates the issue to Plex’s native Windows playback/audio path rather than the server, network connection, media files, speakers, or general Windows audio.
Confirmed behavior
- Plex for Windows: video works, no audio
- Plex HTPC: video works, no audio
- Plex Web (
app.plex.tv/desktop) in Edge: video and audio both work - Other Windows applications/browser audio works normally
- Plex Web can see and remotely access the Phoenix server normally
- Plex for Windows can also remotely access Phoenix normally
Media tested
Tested multiple titles, including:
- Blue Eye Samurai
- Video: 1080p HEVC Main
- Audio: EAC3 5.1 + Atmos
- Plex initially reports both as Direct Play
- No audio
- Flow (2024)
- Video: 1080p HEVC Main
- Audio: EAC3 5.1
- Plex initially reports both as Direct Play
- No audio
This confirms the problem is not limited specifically to an Atmos track.
Forced-transcode test
To rule out EAC3 Direct Play/decoder problems, playback quality was manually reduced to force server transcoding.
Plex Dashboard then showed:
- Video: HEVC 1080p → H.264 720p Transcode
- Audio: EAC3 5.1 → OPUS Transcode
There was still no audio.
This is particularly important because the problem survives conversion away from EAC3 entirely. Therefore, it does not appear to simply be an EAC3/Atmos decoding problem.
Plex audio settings tested
- Audio Device changed/explicitly selected
- Audio Device Kind: Basic
- Channels: 2.0
- Exclusive Audio: Disabled
- Audio passthrough: Disabled
- Various Plex audio configuration changes did not restore sound
The Audio Stream selector has also appeared white/gray/unavailable during troubleshooting.
Windows troubleshooting performed
- Checked Windows Volume Mixer
- Plex does not appear as an actively producing audio application while media is playing
- Windows audio reset/troubleshooter performed
- Other applications continue producing sound normally
- Plex Web continues producing sound normally
Clean Plex reinstall performed
Performed more than a normal reinstall:
- Fully closed Plex/background Plex processes
- Uninstalled Plex for Windows
- Deleted:
%LOCALAPPDATA%\Plex - Rebooted
- Reinstalled a fresh copy of Plex for Windows
- Tested before modifying settings
Result: no change; still no audio.
Plex HTPC was also installed separately and tested.
Result: Plex HTPC also has no audio.
This is notable because both native Plex Windows applications fail while Plex Web succeeds.
Dolby codec test
Based on reports of Windows/Plex EAC3 problems, installed:
DolbyLaboratories.DolbyDigitalPlusDecoderOEM
from the Dolby AC-3/AC-4 package commonly suggested for Plex Windows audio problems.
Result: no change.
This also aligns with the earlier test where Plex transcoded EAC3 to Opus and still produced no sound.
AC-4 does not appear relevant to the media being tested.
Browser control test
Opened the hosted Plex Web application in Edge, signed into the same Plex account, and connected to Phoenix.
Played Flow, the same title that has no audio in Plex for Windows.
Result:
Audio worked immediately.
No server-side changes were required.
Current working theory
There appears to be a problem specifically with the native Plex Windows playback engine/audio-output initialization on this machine.
The strongest evidence is:
Plex for Windows → silent
Plex HTPC → silent
Plex Web → working audio
EAC3 Direct Play → silent
EAC3 transcoded to OPUS → still silent
Other Windows applications → working audio
One additional troubleshooting step from research is creating an mpv.conf under:
%LOCALAPPDATA%\Plex
with:
ao=directsound
audio-exclusive=no
ao=wasapi
audio-exclusive=no
to explicitly force the underlying player toward WASAPI/Direct Sound/non-exclusive audio output.
What I’m asking Plex Support to help determine
I’d like assistance identifying why the native Plex Windows clients are apparently failing to initialize/output an audio stream while the hosted Plex Web client works normally on the exact same hardware, server, account, network connection, and media.
I can provide Plex client logs captured immediately after reproducing the issue if needed.
