So, to get some testers for the plugin: The final version is ready to be used: https://pyra-handheld.com/boards/threads/sound-output-plugin-for-pandora-configbutton.79781/
I need some feedback before I can open a pull request to get this into the configbutton repository and into the firmware in the end.
Tbh I don't even know, whether this .so file is working for everyone, to please test if you are interested in using bluetooth headsets