Windows app is not finding any local audio sources.

Roon Core Machine

Windows 10 (10.0.19045)
Processor AMD Ryzen Threadripper 2950X 16-Core Processor, 3500 Mhz, 16 Core(s)
128GB RAM

Networking Gear & Setup Details

Qlogic 10G fiber → Unifi XG16 → Dell S6010-ON → dedicated Ubuntu 22.04 (Ubuntu 22.04.1 LTS (GNU/Linux 5.15.0-58-generic x86_64)) server running Roon core 2.0 build 1193 (boot to SSD, library on QNAP NAS over a pair of trunked 10G fiber connections)

Connected Audio Devices

Primary audio device while using Roon is the RME dac (top of the list below)
All audio devices listed below (as reported by MsInfo):

Name RME ADI-2 DAC
Manufacturer RME
Status OK
PNP Device ID USB\VID_2A39&PID_3FD3\71D087C8343E3C8
Driver C:\WINDOWS\SYSTEM32\DRIVERS\MADIFACE_USB_64.SYS (0.9.805.0, 329.76 KB (337,672 bytes), 10/26/2020 10:34 AM)
Name NVIDIA High Definition Audio
Manufacturer NVIDIA
Status OK
PNP Device ID HDAUDIO\FUNC_01&VEN_10DE&DEV_0091&SUBSYS_10DE12A4&REV_1001\5&36DD400F&0&0001
Driver C:\WINDOWS\SYSTEM32\DRIVERS\NVHDA64V.SYS (1.3.39.16, 125.98 KB (129,000 bytes), 6/3/2022 8:31 AM)
Name Sonic Studio Virtual Mixer
Manufacturer Nahimic
Status OK
PNP Device ID SWD\DRIVERENUM{1B98EF90-CA0E-11E7-8F1A-0800200C9A66}#AVOLUTESS3VAD&6&26D36B47&0
Driver C:\WINDOWS\SYSTEM32\DRIVERS\AVOLUTESS3VAD.SYS (10.0.10011.16384, 91.48 KB (93,672 bytes), 10/14/2021 8:00 PM)
Name Realtek High Definition Audio
Manufacturer Realtek
Status OK
PNP Device ID HDAUDIO\FUNC_01&VEN_10EC&DEV_1220&SUBSYS_10438765&REV_1001\5&1DA58DC2&0&0001
Driver C:\WINDOWS\SYSTEM32\DRIVERS\RTKVHD64.SYS (6.0.8960.1, 7.04 MB (7,386,728 bytes), 10/14/2022 8:30 AM)
Name NVIDIA Virtual Audio Device (Wave Extensible) (WDM)
Manufacturer NVIDIA
Status OK
PNP Device ID ROOT\UNNAMED_DEVICE\0000
Driver C:\WINDOWS\SYSTEM32\DRIVERS\NVVAD64V.SYS (4.45.0.0, 57.98 KB (59,368 bytes), 11/17/2022 9:01 AM)
Name USB Audio Device
Manufacturer (Generic USB Audio)
Status OK
PNP Device ID USB\VID_0AC8&PID_3420&MI_02\9&1B017D64&0&0002
Driver C:\WINDOWS\SYSTEM32\DRIVERS\USBAUDIO.SYS (10.0.19041.2251, 201.00 KB (205,824 bytes), 11/9/2022 9:25 AM)

Number of Tracks in Library

2028 albums. The tracks tab is not giving me a count.

Description of Issue

My Roon core is now unable to find the audio devices on my local machine. It can find the devices on different subnets to which is will not stream music (different issue that I would love to resolve), but it is now refusing to find the audio devices on my Windows desktop.

This is the audio section of settings in the app. To clarify, before someone follows any red herrings, the machine in question and the Roon Core are both on the 192.168.42.0/24 network and has been working quite well up until ~4-6 weeks ago. There was a point at which I would start the Windows app and it would not detect my local audio devices so I would restart as administrator and that resolved the issue. Now, not even that is working.

Both the Windows app and the core are V2 build 1193.
I’ve updated the RME dac to V51 of the firmware and .9805 of the MADIFace drivers (2023-01-04 release).

Other apps like Windows Media Player, VLC, Firefox, Chrome, Star Citizen, etc, play audio just fine through the on-board audio (Realtek) and the RME DAC. These are not running at the same time as the Roon app.

It’s not clear to me where the screen shot came from. Is it from a second computer running Roon remote to control the core that is on a different computer?
If so, do you have firewall turned on on this machine? And further if so, do you have Roon.exe and RAATserver added to the exceptions for the firewall?
A test would be to turn the firewall off for bit and see if that fixes it.
see this KB:

Windows update sometimes “fixes” your settings for you, so would not be surprised if that has happened.

That screenshot is from the “Settings” > “Audio” tab in the Windows Desktop App of the machine in question.

There is no firewall between the Windows machine in question and the Roon server, including either of the machines themselves.

I read that “Everything in the Support Category is reviewed by staff”, but there’s no definition on responses or times.

I would love to be able to use the products for which I’ve purchased a lifetime subscription, but with it completely failing within 6 weeks of having done so I’m developing some buyer’s remorse.