I’m currently building a tool for recording songs or audiobooks from spotify to directly sync them to a toniebox. (Don’t know if its kinda popular or even known outside of germany but it’s a childrens music box). Some automation using oban, walllaby and the spotify web sdk going on here. All nicely integrated with realtime updates utilising LiveView.
I’m probably going to open-source the code if anybody is interested (also having a hosted version of it in the next couple of days available)