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我正在尝试使用 10 种乐器从 MIDI 文件中提取音符、和弦和休止符music21,在这篇文章之后,我可以为每种乐器获取这些:

file = 'example.mid'
midi = converter.parse(file)  
parts = instrument.partitionByInstrument(midi) 
notes_for_instruments = []
for i in range(len(parts.parts)): 
    notes_to_parse = parts.parts[i].recurse()
    instr = parts.parts[i].getInstrument()
    instruments.append(instr.instrumentName)
    notes, quarters = [],[] 
    for element in notes_to_parse:   
        if isinstance(element, note.Note):  
        # if element is a note, extract pitch   
            notes.append(str(element.pitch))
        elif(isinstance(element, chord.Chord)):  
            # if element is a chord, append the normal form of the   
            # chord (a list of integers) to the list of notes.   
            notes.append('.'.join(str(n) for n in element.normalOrder))  
        elif isinstance(element, note.Rest):
            notes.append('Rest')

    notes_for_instruments.append(notes)

这是每个乐器的音符、和弦和休止符的数量

StringInstrument 2928
None 949
Taiko 29
Timpani 14
Trumpet 616
Flute 2938
Clarinet 2417
Violoncello 32
Oboe 1076
Horn 411
Bassoon 1749

如您所见,它们非常不同,这是因为我没有提取所有可用信息。如何认证这个结果以同步和弦、音符和其他几种乐器?

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