Update app.py

app.py

@@ -170,7 +170,7 @@ def tts_interface_sync(text, voice, rate, pitch):
 
 # Gradio interface
 async def create_demo():
-    voices = await get_voices()
+    voices = await get_voices()  # Now this function is defined
     default_voice = "en-US-AndrewMultilingualNeural - en-US (Male)"
     description = """
     Default = male, other voices 1F:US_Emma, 2F:US_Jenny, 3F:HK_Yan, 1M:AU_Will, 2M:IT_Guiseppe,3M:US_Brian,  1C: Childvoice, 1O = OldMan