Ttslab is an AI-powered text-to-speech tool that provides custom voice and sound clip options for streamers on Twitch. Its desktop app allows for seamless management and playback of text-to-speech with easy customization options. It processes 20-second audio in less than 3 seconds in real-time, and provides custom alert and profanity filters for a better viewer experience. The tool also offers unique voices and sound clips for increased creativity and customization.