UPDATE

app.py

@@ -20,8 +20,8 @@ def process_audio(input_file, effect_8d, effect_slowed, effect_reverb,
             sound = Fusion.effectReverb(sound, room_size, damping, width, wet_level, dry_level, "temp"+output_file+".wav")
 
         # Save the processed sound and return the output file
-        Fusion.saveSound(sound, output_file, effect_reverb, "temp"+output_file+".wav")
-        return output_file
+        output = Fusion.saveSound(sound, output_file, effect_reverb, "temp"+output_file+".wav")
+        return output
 
     except Fusion.InvalidMusicFileError as e:
         return str(e)