NVIDIA's latest tech makes AI voices more expressive and realistic

The voices on Amazon's Alexa, Google Assistant and other AI assistants are far ahead of old-school GPS devices, but they still lack the rhythms, intonation and other qualities that make speech sound, well, human. NVIDIA has unveiled new research and tools that can capture those natural speech qualities by letting you train the AI system with your own voice, the company announced at the Interspeech 2021 conference. To improve its AI voice synthesis, NVIDIA's text-to-speech research team developed a model called RAD-TTS, a winning entry at an NAB broadcast convention competition to develop the most realistic avatar. The system allows an individual to train a text-to-speech model with their own voice, including the pacing, tonality, timbre and more. Another RAD-TTS feature is voice conversion, which lets a user deliver one speaker's words using another person's voice.