small fixes

app.py

@@ -29,11 +29,12 @@ import soundfile as sf
 
 from model import get_pretrained_model, language_to_models
 
-hint_filename = f"{uuid.uuid4()}.wav"
+hint_filename = f"/tmp/{uuid.uuid4()}.wav"
 os.system(
     f"""
-wget https://huggingface.co/spaces/k2-fsa/text-to-speech/resolve/main/hint.wav
-mv -v hint.wav {hint_filename}
+wget -O {hint_filename} https://huggingface.co/spaces/k2-fsa/text-to-speech/resolve/main/hint.wav
+ls -lh *.wav
+ls -lh /tmp/*.wav
 """
 )