The TTS Voice Wizard is an AI tool that allows users to convert speech-to-text and back to speech using various speech recognition and text-to-speech methods. It also enables users to send OSC messages, play songs, and display avatars in VRChat, control avatar parameters with voice commands, and display heart rate or other customized interact counters in VRChat. The tool offers 100+ different voices with various custom options, and supports translation between 20 different languages. It is available on GitHub under the MIT license, and contributions are welcome from the community.