I’ve got a bucket of files to remaster
Remaster? Have you got the original readings—before you did anything to them?
We publish an Audiobook Mastering Suite of tools. Apply them all, in order, don’t add any steps and don’t leave anything out.
The settings should stick. Once you put the numbers into the tool, they should stick there time after time. I can rack through the whole pile in about 20 seconds. That’s taken from here which is a more detailed explanation and will tell you where to get tools from if you don’t have them all.
The suite guarantees ACX Peak and ACX RMS (loudness) and if you recorded in a quiet, echo-free room, you may pass Noise and be done.
However. If we’re following someone else processing, this may not go so well. ACX is sensitive to funny sounding voices from having applied too many effects or effects with too strong a setting. There is no making a trash recording and beating it with a stick until it passes. It may pass the technical restrictions but it will never pass Human Quality Control where a real person listens to it.
These are descriptions of numbering values and the ACX Specifications.
Post back if you get stuck anywhere.
Koz