PMP cannot passthrough Atmos to receiver

Plex Media Server Desktops & Laptops
1

Server Version#: latest version
Player Version#: 2.50.0

Sorry for another post regarding Atmos passthrough via PMP. Looked through various threads, but wasn’t able to fix whatever issue I’m having. Hopefully I can get some troubleshooting tips from the community!

Devices:
Windows 10 PC > hdmi > Yamaha RX-V2085 > hdmi > Samsung Q70
Synology DS218+ all wired to same network

PC:
Running PMP 2.50.0
Nvidia GTX 1080, Ryzen 3600x

Issue:
When playing Atmos movies in PMP, the receiver is only getting PCM and playing media back with 5.1 (Atmos channels are not lit up, and receiver info screen shows PCM). However, when playing the sample media in Dolby Access and playing games, I am getting all channels and receiver is showing Dolby Atmos.
In PMP, I enabled in Audio settings HDMI and all passthrough options available - I did not see Atmos as one, but read somewhere that it falls under Dolby TrueHD?

Things I’ve tried:

  • updated/reinstalled geforce drivers, both for video and hd audio
  • installed Dolby Access and configured for Home Theater (read PMP uses WASAPI, so doesn’t matter?)
  • uninstalled Dolby Access, and setup Windows audio for just 7.1
  • disabled enhancements in Windows audio settings, disabled allow apps exclusive control
  • disabled and enabled realtek onboard audio, even though I’m using HDMI from GPU
  • checked Yamaha receiver settings, not sure if there’s anything to change here

Not sure if there’s something I’m missing. Let me know if there’s anything else I need/should do. I know Atmos is working, but just not in PMP. If more detail is needed, I can upload pics later.

Thanks in advance!

2

Did you activate Passthrough in PMP?
Set device type to ‘HDMI’ in this dialog.

Audio_settings
Audio_settings829×603 92.8 KB

Then leave the dialog and re-enter it.
Now check all the checkboxes which your AVR can decode.

Your HDMI cable and ports in all devices must be HDMI 2.0 compliant, AFAIR.

3

Thanks for quick reply!

Yes, I believe all my devices are compliant as Atmos is working when using Dolby Access, playing games, and MPC.

And also have all passthrough options enabled in PMP.
Device Type: HDMI
Channels: Autoselect (I have 5.1.2)

Normalize Downmixed Volume is disabled though. Exclusive Mode also disabled.

4

Sorry, then I’m out of ideas. Passthrough should work.

5

I’d try exclusive mode.

also, are you using ‘tv mode’ in PMP?

(it’s been awhile I don’t remember what its called or looks like)

6

Thanks TeknoJunky! I think that did the trick :smiley:

For others who also have similar issues, here’s the settings I have now:

Windows:
Enabled “Allow applications to take exclusive control” and “Give exclusive mode applications priority” in Windows sound control panel
Disabled all enhancements
Spatial Sound set to Dolby Atmos for Home Theater

PMP (tv mode):
Device Type: HDMI
Channels: autoselect
Enabled Normalize Downmixed Volume
Enabled Exclusive Mode
All passthrough options selected, specifically Dolby TrueHD

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