Update app.py

app.py

@@ -56,6 +56,9 @@ def get_audio_from_yt_video_ref(yt_link: str, start_point_in_second=0, duration_
     return filename_ref, filename_ref
 
 def inference(file_uploaded_in, file_uploaded_ref):
+    # clear out previously separated results
+    os.system(f"rm -r {yt_video_dir}/separated")
+    
     # Perform music mixing style transfer
     args = set_up()