Update app.py

app.py

@@ -225,6 +225,22 @@ async def create_demo():
     00:00:00.000 "This is the default voice." more default. "1F Now a female voice." and back to default.
     00:00:05.000 "1C Yes," said the child, "it is fun!"
     ```
+    ***************************************************************************************************
+    1M = en-AU-WilliamNeural - en-AU (Male)
+    1F = en-GB-SoniaNeural - en-GB (Female)
+    2M = en-GB-RyanNeural - en-GB (Male)
+    2F = en-US-JennyNeural - en-US (Female)
+    3M = en-US-BrianMultilingualNeural - en-US (Male)
+    3F = en-HK-YanNeural - en-HK (Female)
+    4M = en-GB-ThomasNeural - en-GB (Male)
+    4F = en-US-EmmaNeural - en-US (Female)
+    1O = en-GB-RyanNeural - en-GB (Male) # Old Man
+    1C = en-GB-MaisieNeural - en-GB (Female) # Child
+    1V = vi-VN-HoaiMyNeural - vi-VN (Female) # Vietnamese (Female)
+    2V = vi-VN-NamMinhNeural - vi-VN (Male) # Vietnamese (Male)
+    3V = vi-VN-HoaiMyNeural - vi-VN (Female) # Vietnamese (Female)
+    4V = vi-VN-NamMinhNeural - vi-VN (Male) # Vietnamese (Male)
+    ****************************************************************************************************
     """
     demo = gr.Interface(
         fn=tts_interface,