Relevant (if perhaps outdated) excerpt from https://www.wired.com/2014/12/e-books-for-the-blind-should-be-legal/ https://www.wired.com/2014/12/e-books-for-the-b

Relevant (if perhaps outdated) excerpt from https://www.wired.com/2014/12/e-books-for-the-blind-should-be-legal/ https://www.wired.com/2014/12/e-books-for-the-blind-should-b... : "Only the Kindle Fire has text-to-speech functionality, which can be (and often is) blocked by individual ebook publishers using DRM."