I do not understand the reference to “Our DeEsser” by kozikowski
This is one of them by Paul L.
There’s another. Looking.
This is Steve’s.
I think Steve’s was an experiment and I’m not sure how much of a finished product it is.
If needed, I use Paul L’s DeEsser after audiobook Mastering at these settings.
The plugin is level dependent, so unless you get insanely lucky, you have to do something to your voice track to put it into the DeEsser range. I Master a voice track first and then apply the DeEsser if needed. ACX has loudness requirements, so the RMS (Loudness) setting effect of Mastering is perfect.
As near as I can tell, Paul L did that way to keep the action of the tool above background noise.
