Note: this instructable required the use of the command line. which you can find at Applications menu > Accessories > Terminal.
Step 1: Adding a bit of software (with Ubuntu).
You can do the same with the Synaptic package manager.
Or use the old command line with:
$ sudo apt-get install xpdf
xpdf will be one of two workhorses we will use.
text2wave is another workhorse, but it comes standard and no need to install. You may want to look at the documentation for text2wave with man or gman (has to be installed).