POLLY TTS

paid amazon tts service , free to try 1 year ( localy cached )

Get your keys here :
Create or use AWS account
https://aws.amazon.com/polly/details/

Click to "identification security informations"

Then create a new set of keys

You can now set AWSAccessKeyId=XXX / AWSSecretKey=XXX/YYY

Voices list : https://aws.amazon.com/polly/details/