This Homebrew tap provides formulae for eSpeak NG, a fork of the eSpeak speech synthesizer.
As I remove any build oddities, my goal is to supersede this repo and contribute these formulae back to homebrew-core.
brew install anarchivist/espeak-ng/<formula>
Or brew tap anarchivist/espeak-ng and then brew install <formula>.
brew help, man brew or check Homebrew's documentation.