Update app.py

app.py

@@ -69,7 +69,7 @@ def chat_tts(text, temperature, top_P, top_K, audio_seed_input, text_seed_input,
 
 # OpenVoice Clone
 ckpt_converter = 'OpenVoice/checkpoints/converter'
-device = 'cuda:0'
+device = "cuda:0" if torch.cuda.is_available() else "cpu"
 
 tone_color_converter = ToneColorConverter(f'{ckpt_converter}/config.json', device=device)
 tone_color_converter.load_ckpt(f'{ckpt_converter}/checkpoint.pth')