To installed text to speech follow this guide then install festvox by performing an apt-get install on one of many voices, like festvox-kallpc16k.
So for short:
sudo apt-get install festvox-kallpc16k festival
update your /etc/festival.scm
Then run a test:
echo "this is a test" | festival --tts
That's it. I will be updating Feynman6 with this code soon.