fix separator

app.py

@@ -15,8 +15,7 @@ except FileNotFoundError:
   pass
 
 
-def spleeter(aud, model_dropdown, model_file, index_file, pitch):
-  separator = Separator('spleeter:2stems')
+def spleeter(separator, aud, model_dropdown, model_file, index_file, pitch):
   filename = os.path.basename(aud).split('.')[0]
   accompaniment_filename = f"./output/audio_example/{filename}_accompaniment.wav"
   vocal_filename = f"./output/audio_example/{filename}_vocals.wav"
@@ -90,5 +89,7 @@ article = "<div style='text-align: center; max-width:800px; margin:10px auto;'><
 
 
 if __name__ == '__main__':
-  gr.Interface(spleeter, inputs, outputs).launch()
+  separator = Separator('spleeter:2stems')
+  lambda_spleeter = lambda aud, model_dropdown, model_file, index_file, pitch: spleeter(separator, aud=aud, model_dropdown=model_dropdown, model_file=model_file, index_file=index_file, pitch=pitch)
+  gr.Interface(lambda_spleeter, inputs, outputs).launch()