Update app.py

app.py

@@ -109,7 +109,7 @@ def AddMelody(input_midi, input_channel, input_patch, input_start_chord):
         output_midi = str(new_fn)
         output_audio = (16000, audio)
         
-        output_plot = TMIDIX.plot_ms_SONG(output_score, plot_title=output_midi, return_plt=True)
+        output_plot = TMIDIX.plot_ms_SONG(output_score, plot_title=output_midi_title, return_plt=True)
     
         print('Output MIDI file name:', output_midi)
         print('Output MIDI title:', output_midi_title)