RHVoice: RHVoice (Free and open source synthesizer) RHVoice: RHVoice: RHVoice is a free and open source speech synthesizer. RHVoice: It consists of the following components: command line tools, speech RHVoice: modules for NVDA and Speech Dispatcher, Windows (SAPI5), Android App RHVoice: RHVoice: RHVoice: RHVoice: RHVoice: RHVoice: