Update app.py

app.py

@@ -1,9 +1,11 @@
 import gradio as gr
 import os
+from pathlib import Path
+
 os.system("midi_ddsp_download_model_weights")
 def inference(audio):
   os.system("midi_ddsp_synthesize --midi_path "+audio.name)
-  return str(audio.name)+"/0_violin.wav"
+  return Path(audio.name).stem+"/0_violin.wav"
   
 title = "Demucs"
 description = "Gradio demo for Demucs: Music Source Separation in the Waveform Domain. To use it, simply upload your audio, or click one of the examples to load them. Read more at the links below."