Original thread: here

As posted above, there is currently no way to change the audio device. This means if we plug in a USB headset after the game is launched, there is currently no way to get audio to play out of the headset unless we relaunch the game.

You can change the audio through Windows, but this doesn't change the audio in game. Regardless of what you do, you have to restart the game.

This is major pain and really hinders the use of headsets. I hope this can be added the near future.