Update app.py

app.py

@@ -59,8 +59,8 @@ def inference(file_uploaded_in, file_uploaded_ref):
     # clear out previously separated results
     os.system(f"rm -r {yt_video_dir}/separated")
     # change file path name
-    os.system(f"mv {file_uploaded_in} {yt_video_dir}/input.wav")
-    os.system(f"mv {file_uploaded_ref} {yt_video_dir}/reference.wav")
+    os.system(f"cp {file_uploaded_in} {yt_video_dir}/input.wav")
+    os.system(f"cp {file_uploaded_ref} {yt_video_dir}/reference.wav")
     
     # Perform music mixing style transfer
     args = set_up()