If you want to install/run this on your system, you'll need to install lilypond, music21, PySimpleGUI and the free copy of MuseScore.
Lilypond: https://lilypond.org/download.html PySimpleGUI: https://pysimplegui.readthedocs.io/en/latest/ Music21: http://web.mit.edu/music21/ MuseScore: https://musescore.org/en
If you're using PyCharm, you can go to PyCharm > Preferences > Project Interpreter, click the "+" sign at the bottom, and search for & install PySimpleGUI and Music21 from there.
For Lilypond, you'll need to make sure it's in your Applications folder (if you're on a Mac) and make sure it's pointed to in your PATH global variable in terminal (you might need to manually add "export PATH="$PATH:/Applications/LilyPond.app/Contents/Resources/bin/" to your bash profile). You can type "lilypond" in terminal to verify it installed right.
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