To further troubleshoot this, I added a bluetooth speaker to the Raspberry Pi. It connected fine. I went to youtube.com and could hear the videos. I went to app.plex.tv and through the browser, I could play my same music library from my Plex server through the bluetooth speaker and it sounded great. When I switched Chromium tabs to connect to my Raspberry Pi Plexamp (localhost:32500), I could not play through the bluetooth. When I checked my Plexamp settings, I can’t find a bluetooth device so I chose default, but it still doesn’t work.