External Speakers and Monterey

[mrgarth]

I have the same issue: 'usbaudio' appears as an available output option, but no sound comes from the headphone port on the DisplayLink device.
I am on a MacBook Pro (13-inch, 2020, Four Thunderbolt 3 ports), Intel processor, Monterey version 12.0.1.
I haven't pinpointed this yet, but the problem seems to arise when:

• when the usb cable is unplugged from the Displaylink device and then reattached
• possibly also when the output device is changed from within Chrome (audio settings for Google Meet calls) or Zoom (audio input/output controls) rather than changing the output device in System Preferences, but I'm not sure.

Things I have tried that do not work to solve the problem once audio stops playing through the DisplayLink device:

• de-selecting and re-selecting 'usbaudio' for output from System Preferences > Sound > Output
• de-selecting and re-selecting 'usbaudio' for output from the menu bar in the Finder. Sometimes usbaudio will disappear from the menu bar but still be visible in System Preferences.
• selecting 'usbaudio' for output in Audio MIDI setup
• unplugging and replugging the USB-C connection from the laptop to the Displaylink device
• powering off and on again the Displaylink hub
• quitting and restarting Displaylink Manager
• resetting coreaudiod from Terminal