Update app.py

app.py

@@ -10,13 +10,14 @@ io4 = gr.Interface.load("huggingface/facebook/xm_transformer_unity_hk-en")
    
 def inference(audio, model):
     print(audio)
+    out_audio = None
     if model == "xm_transformer_s2ut_en-hk":
         out_audio = io1(audio)
     elif model == "xm_transformer_s2ut_hk-en":
         out_audio = io2(audio)
     elif model == "xm_transformer_unity_en-hk":
         out_audio = io3(audio)
-    else:
+    elif model == "xm_transformer_unity_hk-en":
         out_audio = io4(audio)
     return out_audio