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我有一个带有标记作为元消息的 MIDI 文件。

fname = "avm.mid"
mid = MidiFile(fname) # input file of type 0
metas = [m for m in mid.tracks[0] if m.is_meta]

我已将元标记时间存储在列表“chordTimes”中。第一个制造商（和弦位置）不是从 0 开始。我制作了一个新的 MIDI 文件：

mo = MidiFile(type =1)# output file
track = MidiTrack()

现在我通读了我想要的和弦列表，并将它们添加到要添加到 mo 的新曲目中。

for i in range(0, len(chords)-1): 
    chordInfo = chordMidiNotes(chords[i], extraBass= False)
    chordNotes = chordInfo[0]
    # append to track note on messages
    if i != 0:
        for note_value in chordNotes: # result has chord notes
            track.append(Message('note_on', note=note_value, velocity=100, time=0))
    else: 
        for j,note_value in enumerate(chordNotes): # result has chord notes
            if j == 0:
                track.append(Message('note_on', note=note_value, velocity=100, time=chordTimes[0])) 
            else: 
                track.append(Message('note_on', note=note_value, velocity=100, time=0))
    # append to track note off messages
    for k,note_value in enumerate(chordNotes): # result has chord notes
        if k == 0:
            track.append(Message('note_off', note=note_value, velocity=127, time=chordTimes[i+1]))
        else: 
            track.append(Message('note_off', note=note_value, velocity=127, time=0))

# now adding track to output file
mo.tracks.append(mid.tracks[0])
mo.tracks.append(track)

mo.save("songWithChords.mid")

但是当我显示它时，和弦似乎不正确并且位置错误，并且看起来比原来的长得多（大约 3 倍）。我检查了输出的标题块：

<meta message time_signature numerator=4 denominator=4 clocks_per_click=24 notated_32nd_notes_per_beat=8 time=0>,

任何帮助将不胜感激。

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