Noise floor checks and balancing

Noise is harder than it looks.

There are several different varieties of noise and we designed techniques to deal with each one individually (except one or two deadly ones).

https://forum.audacityteam.org/t/audiobook-mastering-version-4/45908/2

You might well say apply them all and be done with it except for a submission requirement not to overprocess. Anyone can beat their voice with a stick repeatedly until it satisfies all the ACX requirements. Several readers tried that. It usually makes it past the ACX robot which is only looking for the three sound values, but it will not make it past Human Quality Control. The human is not going to pass a voice that sounds like a bad cellphone, and by the way, noise processing is one of the reasons cellphones sound like that.

ACX’s goal is somebody reading to you in real life, or as I put it, somebody telling you a story over cups of tea.

So it pays well to figure out which noise you have (in English from that page) and apply the appropriate remedies. If you’re not sure what you’re doing wrong, post a test. Post if you have trouble applying the corrections.

http://www.kozco.com/tech/audacity/TestClip/Record_A_Clip.html

Koz