Update app.py

app.py

@@ -6,6 +6,7 @@ from TTS.tts.configs.xtts_config import XttsConfig
 from TTS.tts.models.xtts import Xtts
 from huggingface_hub import hf_hub_download
 import scipy.io.wavfile
+import soundfile as sf
 
 # Set the cache directory for Hugging Face models to ensure they are saved within the Space
 os.environ['HUGGINGFACE_HUB_CACHE'] = '/app/.cache/huggingface/hub'