Dell (Displaylink) USB 3 Sound out Not Working

[pnaylor]

I have a Dell XPS-9333 laptop running Windows 10 through a DisplayLink USB3 Hub. When connecting extension speakers through the sound out (microphone green socket) no sound comes through the speakers (only the laptop one). I have tested the speakers on other computers and they work fine.
I have downloaded latest DisplayLink Software 7.9 as well as updated Windows 10. Plus I have run all the available Troubleshooters.
When I first connect the extension speakers, there is a crackling sound but no music or sound can be heard when selected on my laptop.

[AlbanRampon]

Hello,
Have you changed the Windows settings so it selects the dock to play?
Here is an article on changing the Windows default playback peripheral (http://support.displaylink.com/knowledgebase/articles/544858-how-to-configure-displaylink-audio).
Kind regards,
Alban