https://github.com/readbeyond/aeneas https://github.com/readbeyond/aeneas can output SMIL e-books where each line of text is associated with the corresponding s

https://github.com/readbeyond/aeneas https://github.com/readbeyond/aeneas can output SMIL e-books where each line of text is associated with the corresponding segment from the audiobook. But I don't know which e-book readers support that format.