i want recommendations for free text to speech interfaces like those used for speech impaired people (screens of icons for quick vocabulary, customizable, with option for full text input)
bonus points for something with a highly customizable voice, or also seeking recommendations for any tts voice that's local, customizable, not genAI, runs on old hardware. i don't want solutions that only work with the system's black box TTS i have to find arcane packs for
please boost! 
@mavica_again there is this company making emulations of old tts engines for musical applications. They have what looks like a free trial only though.
