Yes you need to provide both an Audio book and an ebook as inputs, if you only have one of these, you could try getting the other from your local library, or you could sail the seas. It’s not a fool proof process, so sometimes you have to try different formats of Audio books to make it work, also depending on how beefy your computer is, it will take some time to process, 1-2 hrs for big books like Stormlight Archive on my laptop

Storyteller, ever wish you could listen to an Audio book and read an ebook at the same time.

Storyteller can combine an Audio book and and ebook to create a single ebook that can be read like a normal ebook or you can listen to it and watch the actively spoken sentences highlighted in real time like a karaoke song lyrics.

Every for profit company will eventually go to shit, that’s a given, it’s only a matter of time. You use their services till they benefit you and when they go to shit you switch to the next best option.