If your camera or microphone aren't being detected in Google Chrome, you may need to enable your microphone within Chrome permissions.
Open Chrome Permissions
Load Forum in Google Chrome, and then click the lock in the left-most corner of the address bar:
In the preferences menu that appears, ensure that both “Microphone” and “Camera” are set to “Allow”:
Note that if you make changes to any preferences in this menu, you’ll have to reload the page before the changes will take effect.