speech4d is a library aiming at providing comprehensive TTS (Text To Speech) and voice recognition capabilities for the D programming language, in the form of both low level bindings and higher level wrapper libraries.

See speech.synthesis to get started with Text To Speech.

No work has been done on voice recognition yet.

import speech.synthesis;

void main()
{
	auto synth = Synthesizer.create();
	synth.speak("Hello, world");
}

import speech.synthesis;

void main()
{
	auto synth = Synthesizer.create();

	foreach(voice; voiceList())
	{
		synth.voice = voice;
		synth.speak(voice.name);
	}
}