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Text To Speech providers
- iSpeech : iSpeech cloud API
- Polly : Amazon TTS cloud
- Microsoft Speech API : Microsoft voices
- NeoSpeech : Free and Commercial
- Nuance : Commercial, MRCP only
- Voxygen Cloud : Caching not allowed, no more commercial offer
- Flite : Free and OpenSource
- uniMRCP : uniMRCP (universal MRCP connector) OpenSource GPL