Only use CUDA if available

app.py

@@ -2,6 +2,9 @@ import gradio as gr
 import tempfile
 from TTS.utils.synthesizer import Synthesizer
 from huggingface_hub import hf_hub_download
+import torch
+
+CUDA = torch.cuda.is_available()
 
 REPO_ID = "ayymen/Coqui-TTS-Vits-shi"
 
@@ -28,7 +31,7 @@ def tts(text: str):
     synthesizer = Synthesizer(
         best_model_path,
         config_path,
-        use_cuda=True
+        use_cuda=CUDA
     )
 
     # create audio file