No Audio Devices shown, at all. Complete absence of any device, is what we have here. Suspect I am wasting my time on this, given that I have never seen a convincing explanation for this, other than the very tired and overused “have you checked your network settings?”. Is this software really fit to run on Windows 11? I fear I have to wave goodbye to my money.
Yes, have checked firewall settings. Added in exceptions in Bitdefender to allow roon, raatserver, qobuz through. Added in exceptions in Windows firewall to allow the same apps through. Turned off both Bitdefender and Windows defender / firewall and retested. Turned off all vpns. I can easily access the topping device outside of roon.
There was a case here with Roon Bridge on W11 to the same DAC. This was caused by incorrect firewall rules, in this case for Bridge. After fixing that it worked, so there does not appear to be a fundamental issue with Roon on W11 with this DAC: