UB DAC disconnects during playback when sample rate switches (ref#U4HF0E)

What best describes your playback issue?

· Music stops playing unexpectedly

What type of Zone is affected by this problem?

· *Directly-connected 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 *no problem*, it's only my other Zone.

How is the affected Zone connected to your RoonServer machine?

· Cable (USB, HDMI, SPDIF, etc.)

Is your device connected directly to the Roon Server via cable or over the network, or is it chained through another device (such as a streamer, Roon Bridge, or Roon Remote)?

· Connected directly to my RoonServer machine

Does the device show up at all in Roon Settings -> Audio?

· Yes, it shows up there, but it isn't Enabled

Does the "Enable" button unlock the Zone?

· I can Enable the Zone, but the Zone disappears

Does the device play audio from another source when using the same connection?

· The device has no problems with another audio source

Have you checked that Roon is whitelisted in any firewalls?

· I've checked the firewall and the issue remains

Is the device using the latest firmware as per the manufacturer?

· Firmware is up-to-date but the issue remains

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

· 9:00 AM Nov 12 - 9:45 AM Nov 12

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

· Denafrips Ares II via USB

Describe the issue

My UB DAC disconnects during pLAYBACK when sample rate switches

Describe your network setup

This does not apply my issue

Hey @Matthew_Brusven,

Thanks for taking the time to write in and share your report! Here are a few next troubleshooting steps for you to try:

Check USB Connection Stability

  • Try a different USB cable (preferably short, shielded, and high-quality). → USB handshake drops can occur at rate switches if there’s minor instability.
  • Try a different USB port on your RoonServer. → Prefer a rear I/O port directly on the motherboard (avoid front-panel or hub-connected ports).
  • Avoid USB hubs or adapters (especially powered hubs).

Test with a fixed sample rate:

  • In Roon → Settings → Audio → Device Setup → Playback, set:
    • Resync Delay: try 500ms or 1000ms
    • Max Sample Rate (PCM): set to a fixed value (e.g., 192kHz)
    • Max Bits per Sample: set to 24
  • Then play only content matching that sample rate for a while. → If playback is stable, the issue is almost certainly tied to how your DAC/USB stack handles rate switching.

Another side test - try toggling between Exclusive Mode on/off in Roon.

Let me know if any of the above help, thank you! :folded_hands:

This is the same DAC I’ve had since I bought a lifetime Roon License in 2020 this only started after I upgraded to Mac OS Tahoe. My DAC switches sample rates just fine in Jriver Media center. It seems pretty clear this is an indues with Roon to me not my hardware. Also why is your fix for my sample rate switching issue involve setting a fixed value? I would not be using a $700 program if I wanted to not have bit perfect playback! I’ve also switched usb cables while trying to figure this out myself. I’m using a M4 Mac Mini. Again if one program has no issue and yours does It seems to me the problem is with the software. Weirdly enough the last time I opened an issue on here the form at least let me fill out what OS I’m using and which version Is there a reason that’s not on the service Form anymore? Also my DAC is plugged directly into the machine the server is installed on there is no network involved in my playback.

Hey looks like this is an= known issue that is being worked on. This post in the early builds section mentions it. EarlyAccess: RoonServer 2.57 Build 1584 is Live!

Good day @Matthew_Brusven !

Yes, you are right and we can see that in Early access this issue should have been fixed.

Can you please let us know whether Early Access build solves the problem for you ?

Thanks!

Regards.

Hi Alex – I have not yet installed the EA, after reading that @Ruud_Brocheler posted that the EA fixed the issue – except for when a sample rate switches to 192KHz. Has Roon tested that use-case with the EA release?

Hello, i am very happy to tell you that 192 kHz isn’t a problem anymore. I don’t know why, but I am in a joyful mood. Thanks!

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Yep the early access build fixed this for me.

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EA also fixed the changing sample rate issue and icon for me! However, installing the new version and deleting the old one has resulted in two Roon toggles in my Local Network settings that are somehow linked, so when you toggle one, they both move! Any way to get rid of the second one?

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