So a lot of us know the new audio SUCKS!!! I have good news I found a way to go back to the old audio system, as well as a great TTs for Pc users.
So for pc users head to your extensions and check out this app. Read Aloud: A Text to Speech Voice Reader.
https://chrome.google.com/webstore/detail/read-aloud-a-text-to-spee/hdhinadidafjejdhmfkjgnolgimiaplp?hl=en
For the phone users. Step 1 What you gata do is download the unlocked chapters. Step 2 Set your phone to offline/airplane mode. Step 3 Wait for the app to recognize that you have no internet. i.e. an error has occurred/something went wrong. Step 4 click the book you want to be read, then use the audio button.
It should now be the old version of the tts. I hope this helps!!!