Update app.py

app.py

@@ -62,6 +62,8 @@ def render_midi(input_midi, render_type, soundfont_bank, render_sample_rate, cus
     escore = TMIDIX.advanced_score_processor(raw_score, return_enhanced_score_notes=True)[0]
     
     escore= TMIDIX.augment_enhanced_score_notes(escore)
+
+    first_note_index = [e[0] for e in escore].index('note')
     
     cscore = TMIDIX.chordify_score([1000, escore])