Update app.py

app.py

@@ -50,7 +50,7 @@ def inference(re_im, session, onnx_model, input_names, output_names):
     output_audio = output_audio.permute(1, 0, 2).contiguous()
     output_audio = torch.view_as_complex(output_audio)
     output_audio = torch.istft(output_audio, window, stride, window=hann)
-    return output_audio.np()
+    return output_audio.numpy()
 
 def visualize(hr, lr, recon, sr):
     sr = sr