TTSGPIO: 'Unable to locate package festival'

Trying to install festival and get the following message:

root@MusicBox:/# sudo apt-get install festival

Reading package lists… Done

Building dependency tree… Done

E: Unable to locate package festival

Any thoughts on how to fix this so that festival can be installed? Also, am I correct in saying that TTSGPIO buttons will not work at pause and play unless festival is installed? I don’t mind not having the speech alert, just want the buttons, so can I avoid installing festival all together?

Thank you for your help in advance.