Look at mod_tts_commandline and the svox TTS engine.
http://wiki.freeswitch.org/wiki/Mod_tts_commandline

-MC

On Sun, Feb 20, 2011 at 8:33 PM, Edward de Jong <edward.dejong@voicecarrier.com> wrote:
I see Cepstra and some other text to speech modules. Which is the best of the free ones? for my experiments I can't afford a fancy one like Cepstra.

edj