- https://github.com/marsyas/marsyas
- https://github.com/ircam-ismm/pipo
- https://github.com/flucoma/flucoma-core/tree/main/include/al...
What kind of music are you trying to transcribe?
Feel free to email me.
https://github.com/Music-and-Culture-Technology-Lab/omnizart and https://basicpitch.spotify.com/
They work better if you apply some source separation before (e.g, https://github.com/sigsep/open-unmix-pytorch, https://github.com/facebookresearch/demucs, or https://mvsep.com)
Still, I think the best results are from proprietary models (specifically https://www.ableton.com/en/manual/converting-audio-to-midi/ and https://www.celemony.com/en/melodyne/what-is-melodyne)