Mac OS 10.13.2 High Sierra
I have been learning as I go (aka hacking) the mastering process for my recorded book, which I plan to submit to Audible. Is there a place here in the forum where I can learn about the best techniques for this? I have been using the Filter - rolloff for voice, RMS normalization and Limiter - in that order.
Seems though that using Noise Reduction is necessary, (even though I have a very quiet studio space) which the ACX folks advise against over-using (makes clips sound “over processed”?)
Happy to hear any and all feedback / direction. Thanks!
Linda
learning … the mastering process for my recorded book
Have you already recorded it? The whole thing?
There is a new ACX Check analysis tool available.
If the one you used looks like this …

… then you have the old one. The new one has a much shorter info panel, works faster, and on longer performances.
https://wiki.audacityteam.org/wiki/Nyquist_Analyze_Plug-ins#ACX_Check
Seems though that using Noise Reduction is necessary
Not always. If you can pass noise by at least -65dB or quieter, then you can usually publish with no further work.
https://forum.audacityteam.org/t/audiobook-mastering-version-4/45908/68
Both the forum and ACX allow you to post a short test before you start pushing tons of sound files around.
Record a ten second sample and post it here.
https://www.kozco.com/tech/audacity/TestClip/Record_A_Clip.html
Do not correct or process anything. Raw voice as you normally perform, cut it to length, export and post it.
Koz