Update app.py

app.py

@@ -256,7 +256,7 @@ def GenerateAccompaniment(input_midi, input_num_tokens, input_conditioning_type,
     
         idx += 1
 
-        if idx == len(chords[:input_num_tokens]):
+        if idx == len(chords[:input_num_tokens])-1:
             break
 
     print('=' * 70)