handle multi-channel audio

app.py

@@ -21,6 +21,8 @@ def denoise(model_name, inputs):
         model = WaveUNetModel.from_pretrained(model_name)
     sr, audio = inputs
     audio = torch.from_numpy(audio)[None]
+    print(f"Audio shape: {audio.shape}")
+
     audio = audio / 32768.0
     audio = audio.permute(0, 2, 1)