|Initial release||November 13, 2013|
22.13.316510576 / July 1, 2020
|Size||around 19 MB|
Google Text-to-Speech is a screen reader application developed by Google for its Android operating system. It powers applications to read aloud (speak) the text on the screen with support for many languages. Text-to-Speech may be used by apps such as Google Play Books for reading books aloud, by Google Translate for reading aloud translations providing useful insight to the pronunciation of words, by Google Talkback and other spoken feedback accessibility-based applications, as well as by third-party apps. Users must install voice data for each language.
Google Text-To-Speech Android application
Bengali (Bangladesh), Bengali (India), Cantonese (Hong Kong), Chinese (China), Chinese (Taiwan), Czech (Czechia), Danish (Denmark), Dutch (Netherlands), English (Australia), English (India), English (Nigeria), English (United Kingdom), English (United States), Estonian (Estonia), Filipino (Philippines), Finnish (Finland), French (Canada), French (France), German (Germany), Greek (Greece), Gujarati (India), Hindi (India), Hungarian (Hungary), Indonesian (Indonesia), Italian (Italy), Japanese (Japan), Javanese (Indonesia), Kannada (India), Khmer (Cambodia), Korean (South Korea), Malayalam (India), Marathi (India), Nepali (Nepal), Norwegian Bomkål (Norway), Polish (Poland), Portuguese (Brazil), Portuguese (Portugal), Romanian (Romania), Russian (Russia), Sinhala (Sri Lanka), Slovak (Slovakia), Spanish (Spain), Spanish (United States), Sundanese (Indonesia), Swedish (Sweden), Tamil (India), Telugu (India), Thai (Thailand), Turkish (Turkey), Ukranian (Ukraine), Urdu (Pakistan), Vietnamese (Vietnam) 
Google Cloud Text-To-Speech
Arabic, Bengali (Bangladesh), Burmese (Myanmar), Czech (Czech Republic), Danish (Denmark), Dutch (Netherlands), English (Australia), English (India), English (United Kingdom), English (United States), Filipino (Philippines), Finnish (Finland), French (Canada), French (France), German (Germany), Greek (Greece), Hindi (India), Hungarian (Hungary), Indonesian (Indonesia), Italian (Italy), Japanese (Japan), Korean (South Korea), Mandarin Chinese, Norwegian (Norway), Polish (Poland), Portuguese (Brazil), Portuguese (Portugal), Russian (Russia), Slovak (Slovakia), Spanish (Spain), Swedish (Sweden), Turkish (Turkey), Ukrainian (Ukraine) and Vietnamese (Vietnam)
Some app developers have started adapting and tweaking their Android Auto apps to include Text-to-Speech, such as Hyundai in 2015. Apps such as textPlus and WhatsApp use Text-to-Speech to read notifications aloud and provide voice-reply functionality.
Cloud Text-to-Speech is powered by WaveNet, software created by Google's UK-based AI subsidiary DeepMind. Since Google bought DeepMind in 2014, it's been exploring ways to turn the company's AI talent into tangible products. Integrating WaveNet into its cloud service is significant as Google tries to win the cloud business away from Amazon and Microsoft, presenting its AI skills as its differentiating factor.
DeepMind's AI voice synthesis tech is notably advanced and realistic. Most voice synthesizers (including Apple's Siri) use concatenative synthesis, in which a program stores individual syllables — sounds such as “ba,” “sht,” and “oo” — and pieces them together to form words and sentences. WaveNet instead uses machine learning to generate speech. It then waveforms from a database of human speech and re-creates them at a rate of 24,000 samples per second. The end result includes voices with subtleties like lip smacks and accents. When Google first unveiled WaveNet in 2016, it was too computationally intensive to work outside of research environments, but it's since been slimmed down significantly, showing a clear pipeline from research to product. Google Cloud Text-to-Speech converts text into human-like speech in more than 180 voices across 30+ languages and variants. It applies groundbreaking research in speech synthesis (WaveNet) and Google's powerful neural networks to deliver high-fidelity audio. Includes exclusive access to WaveNet technology DeepMind has done groundbreaking research in machine learning models to generate speech that mimics human voices and sounds more natural, reducing the gap with human performance by 70%. Cloud Text-to-Speech offers exclusive access to 90+ WaveNet voices and will continue to add more over time.
- Korean now supported.
- Google announced that Arabic would never be supported despite having more than 467 million native speakers. (Arabic is available from 22.13.316510576 version)
- Version 3.0 added support for natural high-quality voices. High-quality voices were now featured in English (United States) as Female (high-quality) whilst English (United Kingdom) also now featured three new high-quality voices; Male, Female (high-quality) and Male (high-quality). These new high-quality voices are much larger than the prior versions in terms of file size with 244MB for the English US female (high-quality) voice compared to just 6.8MB for the regular female voice version. These high-quality voices were added to ensure higher quality pronunciation and enunciation with intonations that are more natural.
- Support for Brazilian, Portuguese and Spanish (United States) brought the total number of languages supported to nine at this point. (German, English (UK), English (US), Spanish (ES), Spanish (US), French, Italian, Korean, and Portuguese (BR). Only English (US) and English (UK) had high-quality voice packs for now.) German, English UK, English US, Spanish ES, Spanish US, French, Italian, Korean, and Portuguese (BR). Only English US and English UK had high-quality voice packs for now.
- User Interface tweaks: Due to having multiple voices for some languages a toggle was added to voices with 2 or more voice packs.
- Russian, Dutch, Polish and English (Indian) were added to the currently supported list of languages.
- Support for Japanese output added.
- Version 4 available (for 6.0 Marshmallow and up)
- Support for Hindi and Indonesian output.
- Improved output quality. Standard-quality voices now surpass the quality of the high-quality voices from previous releases.
- Four new languages now supported: Cantonese (Hong Kong), Mandarin (China), Thai (Thailand) and Turkish (Turkey).
- Bug fixes and other improvements.
- Improved voice quality.
- Added support for Bengali (Bangladesh), Danish (Denmark), English (Australia), Finnish (Finland), Hungarian (Hungary), Norwegian (Norway), and Mandarin (Taiwan) and Swedish.
- The offline voices can now speak at a faster rate.
- Plus lots of bug fixes and performance improvements.
- Added support for Swedish and Vietnamese.
- Bug fixes and improvements.
- Alternative voice variations now available on every device.
- Added support to amplify speech volume over other audio.
- Extended support for emoji verbalisation in Chinese, Dutch, Danish, English, French, German, Italian, Japanese, Korean, Polish, Portuguese, Russian and Spanish.
- Bug fixes and improvements.
- Added support for Bengali (India), Czech, Khmer, Nepali, Sinhala and Ukrainian.
- Number processing can now be turned off in settings. This produces a more literal pronunciation of the text. For example, 09/10/2017 will be pronounced as oh nine slash ten... Only available for English voices.
- Intonation control is now available for more voices.
- Various other improvements to various voices.
- Added support for Filipino and Greek.
- Added support for Estonian, Romanian and Slovak.
- Various other improvements to our voices.
- Added support for French (Canada), Javanese and Sundanese.
- More voices to choose from: English (Australian), English (United Kingdom) and French (France)
- All voices for a language are now downloaded together, saving storage space on a device.
- Performance improvements for 64-bit devices.
- Various other improvements to voices.
- Added support for English (Nigeria), Gujarati, Kannada, Malayalam, Marathi, Portuguese (Portugal), Tamil, Telugu and Urdu.
- New app icon.and many more feataures
- Google Text-to-Speech - Apps on Google Play
- Supported voices and languages | Cloud Text-to-Speech Documentation
- "Google, Hyundai show off new third-party Android Auto apps". CNET. CBS Interactive. http://www.cnet.com/au/news/google-hyundai-demonstrate-android-autos-new-api/. Retrieved 17 January 2015.
- "Google Text-to-Speech engine arrives to Google Play". Android Authority. http://www.androidauthority.com/google-text-to-speech-314826/. Retrieved 23 November 2014.
- Bogdan Petrovan (6 March 2014). "Google updates Text-to-Speech engine with new and high-quality voices". http://www.androidauthority.com/google-text-to-speech-high-quality-voices-354394/.
- "Google Text-to-Speech updated with new languages, including Dutch, Polish, and Russian". Android and Me. http://androidandme.com/2014/05/applications/google-text-to-speech-updated-with-new-languages-including-dutch-polish-and-russian/. Retrieved 23 November 2014.
- "Google's Text-To-Speech Engine Now Supports Japanese Output". Android Police. http://www.androidpolice.com/2014/09/13/googles-text-to-speech-engine-now-supports-japanese-output/. Retrieved 23 November 2014.
- "Google says Text-to-Speech no longer needs high quality voices in latest update". Android Central. http://www.androidcentral.com/google-removes-high-quality-voices-text-speech-update-thats-not-bad-thing/. Retrieved 16 December 2014.