I’ve long used OS X and MacOS’s command line
say command as a “read that back to me” proof reading tool. Unfortunatly, in recent Mac OS release
say can be a bit flakey and I’ve had to look for substitutes.
I don’t know much about the folks behind it, but mimic been working out OK for me. The voices aren’t awful and (most importantly) it can write out a few minutes of speach without hanging. The repo has instructions for compiling from source, but it’s also just a
brew install mimic away.