Move XTTS imports

gradio_app.py

@@ -17,9 +17,6 @@ from huggingface_hub import snapshot_download
 
 from langdetect import detect
 
-from TTS.tts.configs.xtts_config import XttsConfig
-from TTS.tts.models.xtts import Xtts
-
 from utils.vietnamese_normalization import normalize_vietnamese_text
 from utils.logger import setup_logger
 from utils.sentence import split_sentence, merge_sentences
@@ -68,6 +65,9 @@ except ImportError:
 xtts_model = None
 def load_model():
     global xtts_model
+
+    from TTS.tts.configs.xtts_config import XttsConfig
+    from TTS.tts.models.xtts import Xtts
     
     repo_id = "jimmyvu/xtts"
     snapshot_download(repo_id=repo_id,