It powers applications to read aloud (speak) the text on the screen, with support for many languages.

[4] Apps such as textPlus and WhatsApp use Text-to-Speech to read notifications aloud and provide voice-reply functionality.

[7] Most voice synthesizers (including Apple's Siri) use concatenative synthesis,[5] in which a program stores individual phonemes and then pieces them together to form words and sentences.

WaveNet synthesizes speech with human-like emphasis and inflection on syllables, phonemes, and words.

Unlike most other text-to-speech systems, a WaveNet model creates raw audio waveforms from scratch.