Unable to play Qobuz and local files (ref#IU99CQ)

Support
1

What best describes your playback issue?

· The queue is skipping tracks

What type of Zone is affected by this problem?

· *All of my Zones* are affected.

Does the issue affect all file formats?

· The issue affects *multiple/all* file formats.

Does the issue happen with local library music, streaming service music, or both?

· *Both streaming and local* *library* music are affected.

Do you encounter any playback errors with the "System Output" Zone?

· The System Output has the same problem as my other Zone.

Do you have a complex network setup?

· Both the device and RoonServer are connecting to a *single router*

Please try rebooting your router.

· No, I'm still having trouble

Do you have an approximate timestamp of when the issue last occurred?

· Last occured yesterday, April 14th at around midnight

What are the make and model of the affected audio device(s) and the connection type?

· Have tried playing through system audio to usb speakers as well as Moondrop Dawn Pro DAC connected via USB-C to computer

Describe the issue

Unable to play any tracks through qobuz and local files

Describe your network setup

Connected via ethernet in an apartment building, unable to access router myself (worked without issue until recently though)

2

Hey @Andy_Phan,

Thanks for writing in and for sharing your report! We were able to review a fresh Roon Server diagnostic report, and observed the following:

Trace: [IEM] [Inactive] [PLAYING @ 0:00] The Edge of Summer - adieu
Trace: [MOONDROP Dawn Pro] [raatclient] GOT [7] {"message":"RAAT__OUTPUT_PLUGIN_STATUS_FORMAT_NOT_SUPPORTED","status":"UnexpectedError"}
Warn: [IEM] [zoneplayer/raat] failed to setup any endpoints..giving up
Info: [audio/env] [zoneplayer -> stream] All streams were disposed

The issue is that the MOONDROP Dawn Pro rejected the audio format Roon tried to send it. Roon attempted to stream PCM 44.1kHz / 16-bit / stereo, and the DAC responded that the format is not supported.

The likely culprit is earlier in the log where the Dawn Pro’s supported formats come back empty:

"output":{"info":{"config":{...}},"supported_formats":""}

Compare that to the NVIDIA audio device, which properly reports its supported formats:

"supported_formats":"48000/16/1|2,48000/24/1|2"

The Dawn Pro returned an empty string there, which means Roon couldn’t pre-validate what formats the device accepts, and when it tried a standard 44.1kHz stream anyway, the device rejected it.

Things to try:

  • In Roon's Device Setup for the MOONDROP Dawn Pro (under Settings → Audio), check whether Exclusive Mode is enabled. The log shows it's currently set to false — toggling it on sometimes resolves format negotiation issues with USB DACs.
  • Make sure no other application (Windows sound mixer, a media player, etc.) has a lock on the Dawn Pro, which can prevent proper format reporting.
  • Try updating the Dawn Pro's USB drivers or firmware if any are available from Moondrop.
  • Restarting the RAAT server (or fully restarting Roon) after ensuring no other app is using the device is also worth trying.
Let me know if any of the above help! 👍
3

Hey benjamin, it looks like updating Moondrop drivers and the retrying with System Output has solved the issue, thank you so much for the help!