The audio/flite port
flite-1.2p7 – text to speech utility
Flite is a small fast run-time speech synthesis engine. It is the
latest addition to the suite of free software synthesis tools
including University of Edinburgh's Festival Speech Synthesis System
and Carnegie Mellon University's FestVox project, tools, scripts and
documentation for building synthetic voices. However, flite itself
does not require either of these systems to compile and run.
The festival lite package was modified from the original source.
You can find the modifications on
out of memory compiling cmu_us_kal_diphone.c