The Votrax SC-01 — the 1980 phoneme chip behind the Type 'N Talk, the Apple II Mockingboard's speech, the HERO-1 robot and a generation of arcade machines — as a speech synthesizer for today's Windows: an NVDA add-on and a SAPI 5 voice, from one shared core.
https://github.com/tgeczy/votraxsc01-nvda/releases/download/v1.0.0/votraxsc01-1.0.0.nvda-addon
https://github.com/tgeczy/votraxsc01-nvda/releases/download/v1.0.0/votraxsc01-1.0.0-setup.exe