Turn XML score into note annotation automatically. Combine Music21 and PrettyMIDI method to double check.
Ideally, I want to eliminate all the decorations, like accent, staccato, any kind of ornament, and tempo-related expression.
Such as --nd, do not convert directions (^, _ or -) for articulations, dynamics, etc.
In the .ly file, convert the instrument into Violin or Cello, no matter what kind of instrument the score was originally made for, because the String instrument will get a more stable note duration of MIDI file than the Woodwind or Piano.
In the .ly file, eliminate all the tempo expressions, and set the tempo to BPM=60. For the same reason as 2nd step, this step aims to get a more stable note duration.
The steps 2 and 3 I wrote a python code to replace the tempo and want to change the instrument clef, see the file replace_tempo.py.
Command example: python replace_tempo.py --path ./1_Bach_Prelude1.ly, then output the file named just add the _replace afterward, like: 1_Bach_Prelude1_replace.ly
Then use the lilypond command lilypond -dmidi-extension=mid 1_Bach_Prelude1_replace.ly to convert the .ly file into a .mid file.
The output file has 2 formats PDF and MIDI, the filename here called: 1_Bach_Prelude1_replace.mid and 1_Bach_Prelude1_replace.pdf
Problem: After I change the tempo and instrument by the command lilypond -dmidi-extension=mid MyFile.ly, the output .pdf show the change of instrument and tempo, but the .mid file didn't apply the instrument change....
Using the MIDI and original XML file, I can use my python script to get each note’s information, specifically, the attribute I want is listed below: ['Onset', 'Offset', 'MIDI number', 'Pitch name', 'Duration', 'Staff', 'Measure', 'Beat in Measure'], see the file merge_music21_prettyMIDI_get_annotation.py
I've done the few annotations by manually going through steps 1~4, now I want to automate the full workflow, the target annotation example is put in the directory, ./ideal_piano_example.