I'd love to have a utility that quickly toggles between two audio outputs in windows.
C:\Windows\system32\rundll32.exe shell32.dll,Control_RunDLL mmsys.cpl,,playbackEdit: nope, but https://soundswitch.aaflalo.me/ will do it - never used it though.
https://github.com/sirWest/AudioSwitch
I think there was another that was some variation on "audio" and "switch"/"switcher".
You can also create a shortcut to nircmd with the setdefaultsounddevice value set and assign a hotkey for the shortcut.
Now I use EarTrumpet, which lists devices in the right click menu.