Nobody can announce directly into ACX. They have a pretty ordinary list of standards (cousin to broadcast), but most people don’t talk that way. If you have a celebrity voice, you can really miss the boat.
We publish two different mastering methods. More in a bit.
You can check your work either by submitting to ACX Audiolab.
Or install ACX Check which was written here.
https://wiki.audacityteam.org/wiki/Nyquist_Analyze_Plug-ins#ACX_Check
They’re slightly different, but they both work from the ACX published sound standards. Someone said AudioLab does not test noise. I don’t know. ACX-Check does.
A recent poster submitted an Audiobook Mastering process.
https://forum.audacityteam.org/t/my-audio-process-for-acx/61549/1
We posted a shorter process that might work for you. This is the long explanation.
https://wiki.audacityteam.org/wiki/Audiobook_Mastering
And this is the short version.
Passing Loudness (RMS) and Peak is a snap compared to Noise. Passing noise is rough. Announcing louder is a lot easier than finding out where that annoying whine behind your voice is coming from.
Making your Audacity blue waves come out right is only the first step. You also have to pass theatrical tests: you don’t stutter, you don’t have lip smacks, and your voice doesn’t scare the horses.
And there are marketing tests. Your book has to be on sale in paper or eBook on Amazon and it has to not be on this list (scroll down).
https://www.acx.com/help/200878270
There was one forum poster who planned on reading a cookbook and another who wanted to read Yoga chants.
That last one is ripe for publishing as a YouTube presentation. I remember one video series where Yoga people arranged in a circle on a wind-swept cliff did their works with artsy camera motion. It was weather dependent and they might have been dying of the cold, but it was stunning and memorable.
Koz