feed the text log into Acapella
a free text-to-speach synthesizer
http://www.acapela-group.com/text-to-speech-interactive-demo.html
animated the soundtrack using Living Actor Presenter
http://www.livingactor.com/Presenter/
More technical :
http://www.youtube.com/watch?feature=player_embedded&v=WnzlbyTZsQY
http://www.kk.org/thetechnium/archives/2011/08/theological_cha.php
Related to this:
http://www.xtranormal.com/