Amazon Polly
Amazon Polly is a TTS (Text-to-Speech) service that, according to Amazon, uses deep learning. The GUI interface is straightforward; one selects one of the two engines, Neural or Standard. Neural is more human sounding. Languages and voices can vary depending on the engine. Voices reflect the dialect, register, and jargon that are typical for a region or country. For example, under English, there are Australian, British, Indian, Irish, New Zealand, South African, US, and Welsh variations. Once the language is selected, the Voice drop down list is populated with available voices for that language. As with languages, certain voices are only available for a particular engine. Voices vary in pitch, loudness, speed, and tonality to simulate different ages and sexes. These controls make it possible to generate speech as a young girl or an old man. There is an option to enable Speech Synthesis Markup Language (SSML) to fine-tune the generated output. Amazon supports a subset of the W3C SS...