Convert music21 to muspy track

[raymondtoh94]

Midi File exported from music21 and also convert to muspy track sound different.
midi_file -> music21_read -> get_key -> music21 export -> test.midi
midi_file -> music21_read -> get_key -> muspy_from_music21 export -> generated_track.midi
test.midi sound different from generated_track.midi

for i in os.listdir(SONGS_PATH):
        if i.lower().endswith(('mid','midi')):
            midi = converter.parse(SONGS_PATH+i)
            
            #Get Midi key
            key = midi.analyze("key")
            if key.mode == "major":
                intervals = interval.Interval(key.tonic, pitch.Pitch("C"))
            elif key.mode == "minor":
                intervals = interval.Interval(key.tonic, pitch.Pitch("A"))
            
            #Transpose to C major or A minor
            transpose_midi = midi.transpose(intervals)
            transpose_midi.write('midi', fp='test.midi') #This Midi is different from muspy midi
            
            
            midi = muspy.from_music21(transpose_midi, resolution=resolution)
            muspy.write("generated_track.midi", midi, kind="midi")
            
            events = muspy.to_event_representation(midi, encode_velocity=True)