fix error

app.py

@@ -40,6 +40,8 @@ def seprate(mixed_voice_path, clean_voice_path, drop_down):
         mixed_voice = mixed_voice_tool
     else:
         mixed_voice,rate = load_voice(mixed_voice_path)
+        mixed_voice = mixed_voice.float()
+        mixed_voice = torch.nn.functional.normalize(mixed_voice, p=2, dim=-1)
     clean_voice,rate = load_voice(clean_voice_path)
     if clean_voice.shape[-1] < 16000*4:
         n = 16000*4 // clean_voice.shape[-1] + 1