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|Initial release||December 14, 2001|
|Stable release||1.2.2 / March 9, 2009|
FreeTTS supports end-of-speech markers. Gnopernicus uses these in a number of places: to know when text should and should not be interrupted, to better concatenate speech, and to sequence speech in different voices. Benchmarks conducted by Sun in 2002 on Solaris showed that FreeTTS ran two to three times faster than Flite at the time.
As of February 2014 the newest version of that project originates from March 2009. The binaries of the 2009 edition crash with Java 1.7.45 and the source package is missing the .java files. That is to say, in February 2014 the project is effectively dead and its set of newest deliverables is incomplete, i.e. it is not possible to revive the project by downloading unmaintained sources.
- Willie Walker, Paul Lamere, Philip Kwok (August 2002). "FreeTTS - A Performance Case Study" (PDF). Sun Microsystems. Retrieved 2009-07-25.
Through using some straightforward optimizations and relying on the aggressive optimizations performed by the Java HotSpot compiler, we were pleased to find that FreeTTS runs two to four times faster than its native-C counterpart, Flite. Clearly, it would be possible for us to roll some of these optimizations back into Flite with the likely result of improving Flite's performance to levels similar to FreeTTS. The lack of Java platform features such as garbage collection and high-performance collection utilities, however, makes performing these optimizations in Flite much more time consuming from a programming point of view.