Choose a default audio output device.
AudioXout
Features: AudioXout is now able to remember and retain the previously chosen sound output.
Purpose: choose a default audio output device in Chrome for media playback.
How to: Click on the extension icon and choose the output device on the website you want to play audio out of.
Note: you will need to authorize the microphone permission that pops up due to chrome restrictions. Once you have done so choose the device again and it will work with the current site in the open chrome tab.
I made this as a fix-up package for the currently broken "AudioPick" Extension. All credits go to the "AudioPick" developers for the original code.