MicrosoftSAPI

LuaSAPI provides a simple and intuitive interface for doing
text-to-speech operations using the Microsoft Speech API in
Windows or WINE with Lua.

Using it can be as easy as:

sapi = require "sapi_interface"
sapi.say("SAPI interface is ready")
sapi.speech_demo()

Documentation is in the source repository README file in GitHub Flavored Markdown.