I have the same issue every time I connect my USB audio DAC. The device installs, is set to default playback device and will show system sounds under mixer but nothing else. I restart audiosrv and it resolves the issue. Depending on the browser and/or the media I'm playing I sometimes have to restart my browser or reload the window before the audio will play. It's a workaround but it's still annoying.
- Open a CMD prompt
windows key + r
put "cmd" in the prompt and hit enter
- In the CMD prompt put the following two lines:
net stop audiosrv
net start audiosrv
- Restart media, reload tab or restart browser in that order until you hear audio.