@support I’m running the ROON core on a Surface Pro 3 connected thru a wired network to a Synology DS416play NAS. The network router/firewall is a Fortinet FortiGate 60D NGFW. (DNS is handled thru a Cisco Umbrella Roaming Client, hence the loopback interface IP for DNS).
WASAPI audio is thru a USB-connected Schiit Jotunheim DAC. The playback problems are occurring when this playback zone is selected. I tried switching the audio output to “System Output” and “Realtek High Definition Audio” (the Surface 3’s internal speakers) and neither of these outputs worked. Same error “An audio file is loading slowly. This may indicate a performance or hardware problem.”
There is also a network-connected Nvidia Shield device in my living room that ROON has recognized on the network, and when I switch to this zone everything works fine!
Disabling the firewall has no effect…the Surface 3 and the Synology NAS are both on the same internal network. ROON was functioning normally with this network setup prior to the Windows 10 upgrade to 1809. After the Windows 10 upgrade, I completely uninstalled and re-installed ROON. The music library loaded normally from the NAS and playback thru the networked Nvidia Shield works normally. The issue is playback directly from the Surface Pro 3 where the ROON Core resides.
Hope this helps. Thank you!