Last night I was mucking around with festival, the text to speech tool (ala the old DECtalk. On my [laptop](http://h10010.www1.hp.com/wwpc/us/en/sm/WF05a/321957-64295-89315-321838-f33-367367.html) it was speaking too fast.
The solution is found in the Festival FAQ: Running Festival
Create the file festival/lib/siteinit.scm (if you don’t already have it) and add the following
(Parameter.set 'Audio_Method 'Audio_Command)
(Parameter.set 'Audio_Command "sox -t raw -sw -r $SR $FILE -c2 -t ossdsp /dev/dsp")
On debian, you put those two lines in /etc/festival.scm