Before you get all excited and tip over your coffee cup, the technical specification testing is step one. Technical testing can be automated. After that, you still have to pass ACX Human Quality Control. That's where a real person listens to your work for theatrical quality. They will be listening for tongue ticks, lip smacks, asthmatic gasping, and whether or not your vocal tone scares the horses.
You have to pass everything. You are offering a theatrical performance for sale.
ACX has some new restrictions for audiobook performances and they're pretty stiff.
I have to be able to buy your book on Amazon. There was a forum poster determined he was going to offer his book on Amazon and post the reading for audiobook at the same time. It wasn't pretty.
ACX posted a list of unacceptable books. No you can't read a cookbook, a dictionary, or technical manual. My shortform version of that is needing to come up with characters, plot, and setting. Scroll down.
https://www.acx.com/help/200878270
It used to be possible to submit a voice test for acceptance before reading the whole book. That's when I found out I can create a technically perfect sound file submission, but I can't read. I won't give up the day job. As of the sickness, they no longer allow pre-production testing.
That's a problem for first-time readers. You can, if you want, submit a voice test on the forum. Do it to this formula. Read down the blue links.
https://www.kozco.com/tech/audacity/Tes ... _Clip.html
We can't guarantee acceptance, but we can head off obvious problems.
Koz