Comment by dsign

It is a supported feature in the epub 3.0 standard. It's possible to distribute an epub with audio, and have the audio sync to the HTML elements that form the ebook's text. And there is an e-reader that actually supports this feature, I can't remember which one now but it should be possible to find it with Google.

It's more of an open problem how to create those epubs. I have some code that can do it using Elevenlabs audio, but I imagine it way harder to have something similar for a human narrator.... who's going to do the sync? Maybe we need a sync AI.