On the C-side, I'm going to add a UDP listener to the code so I can send k-synth incantations live from Emacs (something I did for my skred program at the suggestion of an Emacs user). Let me know if anyone wants to know about this when it's usable. On the desktop app side, I use miniaudio (thank's Macron) so this is portable to the usual suspects. I also made a single header file cross platform midi library which I have some devious plans for in this space. Stay tuned.