LilyPond to ABC converter using python-ly

Usage:

• pipenv install
• pipenv run python ly2abc.py myfile.ly

This is heavily a work in progress. It does not yet handle conversion from LilyPond for the following features of the ABC specification:

• Tuplets
• Annotations other than markup above the node
• Modes besides major, minor, dorian, mixolydian
• Double accidentals
• Decorations
• Grace notes
• Clefs other than treble clef
• Multi-measure rests
• Modified or explicit key signatures
• Suggested drone (from ppile markup) --> include via %%text in the same place as midi directives?

No support is planned for:

• Lyrics
• Multiple voices

On the LilyPond side, it does not support:

• Explicit beaming
• Explicit line breaks
• Any feature of LilyPond that isn't supported by ABC
• Unfolded repeats inside \chordmode (volta repeats should be OK so long as they match what's in the primary melody line)
• Transposed \chordmode

To make overrideable:

• Unit length
• Beaming strategy

TODO

%%ambitus

BUGS

internal \partial not handled well (Won't fix) G_8 clefs for melody not handled handling utf-8 in titles