Flite is a small, fast run-time synthesis engine, designed for
embedded systems and servers.  Flite was developed by Alan W Black and
Kevin Lenzo at Carnegie Mellon University, in Pittsburgh.  The
city with TTS at its heart.

AHI audio backend source code is available here:
http://www.a500.org/downloads/development/flite-ahidriver_7z.readme

Installation:

Copy SDK/#? ALL SDK: