Just old-school TTS from Acapella, a paid one Heather.
I got used to it before there was a wide selection on Audible and it's ok.
You can't use audio for serious books or articles but History, Biographies, Fiction, random tech articles bookmarked in Pocket and it's locally generated, so no latency is great.
Additionally, when you use a TTS engine, you can see the text and easily copy the things you want to make a note on later. With Audiobooks it's not possible.
