NHMTTS SAPI5 is a Vietnamese text-to-speech engine. The release of this version (4.0) includes features: - Synthesize Vietnamese speech with natural voices whose prosodics (duration, pause and ... - Support SAPI5 interface. - Can work with text contain both Vietnamese and another language in Unicode format. - Provide ... - Allow binding another voice of non-Vietnamese language to a NHMTTS voice to support alouding text in ...