Update app.py

app.py

@@ -44,7 +44,7 @@ def ui():
 
     if audio_file is not None:
         waveform_clean,sr=torchaudio.load(audio_file)
-        waveform_clean = waveform_mix.to(torch.double)
+        waveform_clean = waveform_clean.to(torch.double)
         stft_clean = stft(waveform_clean)
         st.text("Your uploaded audio")
         st.audio(waveform_clean)