Text-to-Speech (TTS)

What Is Text-to-Speech, or TTS?

From Wikipedia, TTS (Text To Speech) is defined as follows:

“Speech synthesis (Text to speech) is the artificial production of human speech. A computer system used for this purpose is called a speech synthesizer and can be implemented in software or hardware. A text-to-speech (TTS) system converts normal language text into speech; other systems render symbolic linguistic representations like phonetic transcriptions into speech.”

TTS Software

Asterisk Flite: Can replace Festival in Asterisk
asterisk-agi-audiotx: Asterisk AGI extension module that adds commands to allow the transfer of audio files to and from Asterisk via an AGI session
asterisk-espeak: Asterisk dial plan application providing speech synthesis using the eSpeak text-to-speech engine
Flite for asterisk 1.6 1.8 and 10
Database Systems Corp. CTI technology with text to speech converter for IVR and voice broadcast applications.
Festival
asterisk-liambrola: Asterisk Dialplan application, which allows you to use Lia_Phon and Mbrola as a French speech synthesizer.

Text-to-Speech tools

Acapela Voices – including Arabic, Czech, Danish, Dutch (NL), Dutch (B), English (UK), English (US), Faroe, French, Finnish, German, Greek, Icelandic, Italian, Norwegian, Polish, Portuguese, Portuguese (Brazil), Russian, Spanish, Spanish (South America), Swedish and Turkish
TextSpeak Text to Speech – Human sounding TTS in over 20 world languages packaged in hardware modules and standalone enclosures
Cepstral Medium quality, low-cost voices
Loquendo TTS for Asterisk
Verbose Text – can use any SAPI4 or SAPI5 voice