I'd found this code as well, and in a previous chat, Fable pointed me to it but first, I have a $100/month Claude subscription, and typically just barely run out every week, so I throw tokens at just about anything. Second, I'd come across that code, but it's windows software, not open source. Third, the encoder isn't anything exciting, and not really a concern except that the Fable version offers the ability to include the decoy notes. Finally, I literally just wrote "Yes, please write that encoder" when fable asked if I want it to "Bigger picture: since the Prodigy plays this format over Bluetooth, an encoder that writes your own MIDI into the right channel this way is probably the missing link for the MP3-to-piano project. I can build a test file if you want to try it."