I don't know about any audio books out there, but there IS the Skeptic's Annotated Bible, both online and in print form. Both are rife with commentary and analysis and do a brilliant job of revealing the bible in all its gory glory.
Also worthy of note is that Steve Wells, the author of SAB, has also given the same treatment to the Quran and Book of Mormon on his website.
How have I never heard of this??? Thank you!
EDIT: When I checked, it was $3... can you link me to something free?
This would be brilliant! A running commentary of the historical context, contradictions, etc!
Here is a good start on the contradictions from Dan Barker: https://ffrf.org/legacy/books/lfif/?t=contra
The cure for fundamentalism by Steve McRoberts available on Amazon is excellent. It goes through the entire Bible much like the skeptics annotated Bible. It skips the unimportant parts but is exhaustive in its commentary. The skeptics is great but only points out inconsistency.
I do Bible study daily these two books are the ones I have both in hard copy and on Kindle.
When purchasing the Skeptics Annotated bible look very carefully. Most listings are very expensive as it is out of print. Something like 50-75 bucks. But if you look carefully you can find a hard copy for about 20. Good luck!