Voices and TTS in Slint. Following TTS (Text to Speech synthesizers) are shipped in Slint64-14.2.1.2, each with a set of voices, namely: espeak-ng flite pico mbrola RHVoice Most of the time these TTS and the associated voices and languages are managed by speech-dispatcher through its so-called "modules" (roughly, a module is associated to a TTS). The custom utility spd-list can answer several questions about the synthesizers, voices and languages. Typing spd-list displays this: This script lists languages and synthesizers available for applications relying on Speech Dispatcher, like Orca or speech-up. Each command below answers the question following it. Don't type the quotes surrounding the command. "/usr/bin/spd-list" usage? "/usr/bin/spd-list -s" available synthesizers? "/usr/bin/spd-list -l" available languages codes? "/usr/bin/spd-list -ls " languages available for this synthesizer? "/usr/bin/spd-list -sl " synthesizers providing voices in this language? The language code has most often two characters, like 'en' 'es' or 'fr' All voices listed are available in Orca and speechd-up. You can get additional voices for flite and mbrola, associated with the modules flite-generic and espeak-ng-mbrola-generic. You can always know which are installed or not typing as root: slapt-get --search mbrola-voice or: slapt-get --search flite-voice then install one of the not-yet installed one, like e.g. slapt-get -i mbrola-voice-it2 In addition to the free (as in free beer) voices shipped in Slint, you can buy voices for: voxin, from https://voxin.oralux.net/get.php voxygen, sending an email to contact@hypra.fr More voices could be made available later, this will be announced on the Slint mailing list.