fixing map location for torch load setting deafult to cpu

app.py

@@ -40,7 +40,7 @@ class SourceSeparationApp:
 
     def load_model(self, model_path):
         model = separator.from_hparams(source="speechbrain/sepformer-wsj03mix", savedir='pretrained_models/sepformer-wsj03mix', run_opts={"device": device})
-        checkpoint = torch.load(model_path, map_location=self.device)
+        checkpoint = torch.load(model_path, map_location=torch.device("cpu")
         fine_tuned_model = SepformerFineTune(model)
         fine_tuned_model.load_state_dict(checkpoint["model"])
         return fine_tuned_model