Update app.py

app.py

@@ -117,9 +117,9 @@ def render_midi(input_midi, render_type, soundfont_bank, render_sample_rate, cus
 
         min_pitch = min([e[4] for e in escore if e[3] != 9])
 
-        fliped_score_pitches = [127 - e[4] if e[3] != 9 else e[4] for e in escore]
+        fliped_score_pitches = [127 - e[4]for e in escore if e[3] != 9]
 
-        delta_min_pitch = min_pitch - min([e[4] for e in fliped_score_pitches if e[3] != 9])
+        delta_min_pitch = min_pitch - min([p for p in fliped_score_pitches])
 
         output_score = copy.deepcopy(escore)