Roon not recognizing any USB DACs (ref#GBR0N2)

Support
1

Hi! What’s not quite right with Roon?

· None of the above quite fits

None of the above quite fits

· None of these quite match

Tell us what's going on

· Roon won't recognize any USB DAC

Tell us about your home network

· ROG Rapture GT-BE25000 is my router with ASUS GX-U1081 as switch, no VPN

2

Hello @Yuwei_Chen ,

Since you are using a Windows PC, I would verify that both Roon.exe and RAATServer.exe have been added as exceptions to your Windows firewall.

You can use these instructions to add the exceptions and the executables themselves would be located in your Database Location/Application folder path.

I would also add these exceptions to any Antivirus or other Firewall blocking applications you may have and ensure that you connected to your network via a Private network, not a Public one, see this guide for more information.

Let us know if this helps!

3

I’ve done all the above solution but none of it worked…

4

Hi @Yuwei_Chen,

Thank you for trying those steps. Let’s check if RAATServer is actually running on your machine.

Open Task Manager (Ctrl + Shift + Esc), go to the Details tab, and look for RAATServer.exe in the list. Is it there?

If it’s not running, that would explain why your USB DACs aren’t appearing — RAATServer is the component responsible for detecting and managing local audio devices in Roon.

Can you please use the directions found here and send over a set of logs to our File Uploader? Once logs have been uploaded, please let us know so that we can check the server for your files, thanks!

Let us know what you see!

5

I’ve upload the logs under yuwei_chen

I’ve tried task Manager and I can see RAATServer popup and disapear

I’ve tried deleting RAATServer folder but it doesn’t work either

please tell me what to do next…

6

Hi @Yuwei_Chen,

Do you by chance have any other security/antivirus software active on the machine?

A fresh Roon Server diagnostic report is showing that Port 9004 is being refused, which means RAATServer starts, then crashes or exits immediately before it can bind to that port. This is why you see it “pop up and disappear” in Task Manager, that’s exactly what’s happening.

If you can, open your antivirus/security suite and check its quarantine or event log. Look for any blocked or terminated process named RAATServer.exe. Add it as a trusted/excluded process (not just a firewall exception, a full exclusion from real-time scanning).

If that doesn’t help, I’d also consider installing/repairing the latest Microsoft Visual C++ Redistributable (x64) and .NET Desktop Runtime.

Thank you @Yuwei_Chen :folded_hands:

7

repair Microsoft Visual C++ actually do the job…!! thank you Benjamin…