I found this website that does a really good job with a FREE online text to speech engine. it is: http://www.naturalreaders.com. I put in all the speech from my milker script to see what it sounded like. They have a bunch of voices to choose from. I am fond of UK-Rachel. I didnt dig too far in but the voices sounded really good (for FREE) with the text I tested. You might be able to use this somehow instead of the Centipede built-in voices.