python - マゼンタの音符シーケンスのテンポを変更するには?

Question

qpmを変更してみました。しかし、それは何も変わりません。ノートシーケンスのテンポを変更したい。私は Colab に取り組んでいます。私のノートブックはここにあります。

    from note_seq.protobuf import music_pb2
    from note_seq import sequences_lib
    
    twinkle_twinkle = music_pb2.NoteSequence()
    
    # Add the notes to the sequence.
    twinkle_twinkle.notes.add(pitch=60, start_time=0.0, end_time=0.5, velocity=80)
    twinkle_twinkle.notes.add(pitch=60, start_time=0.5, end_time=1.0, velocity=80)
    twinkle_twinkle.notes.add(pitch=67, start_time=1.0, end_time=1.5, velocity=80)
    twinkle_twinkle.notes.add(pitch=67, start_time=1.5, end_time=2.0, velocity=80)
    twinkle_twinkle.notes.add(pitch=69, start_time=2.0, end_time=2.5, velocity=80)
    twinkle_twinkle.notes.add(pitch=69, start_time=2.5, end_time=3.0, velocity=80)
    twinkle_twinkle.notes.add(pitch=67, start_time=3.0, end_time=4.0, velocity=80)
    twinkle_twinkle.notes.add(pitch=65, start_time=4.0, end_time=4.5, velocity=80)
    twinkle_twinkle.notes.add(pitch=65, start_time=4.5, end_time=5.0, velocity=80)
    twinkle_twinkle.notes.add(pitch=64, start_time=5.0, end_time=5.5, velocity=80)
    twinkle_twinkle.notes.add(pitch=64, start_time=5.5, end_time=6.0, velocity=80)
    twinkle_twinkle.notes.add(pitch=62, start_time=6.0, end_time=6.5, velocity=80)
    twinkle_twinkle.notes.add(pitch=62, start_time=6.5, end_time=7.0, velocity=80)
    twinkle_twinkle.notes.add(pitch=60, start_time=7.0, end_time=8.0, velocity=80) 
    twinkle_twinkle.total_time = 8
    
    twinkle_twinkle.tempos.add(qpm=120);
    
    
    # This is a colab utility method that visualizes a NoteSequence.
    note_seq.plot_sequence(twinkle_twinkle)
    
    # This is a colab utility method that plays a NoteSequence.
    note_seq.play_sequence(twinkle_twinkle,synth=note_seq.fluidsynth)