RMS Normalize makes audio sound tinny

Has anyone else had this problem?

You’re number one!

Something is broken. Normalize and RMS Normalize are cousins. They both change the volume of a clip and nothing else (Normalize can change DC level which is slippery because DC is a microphone defect and not sound).

Normalize, in common with most tools in this group, does it by sensing peaks or tips of the blue waves. RMS Normalize, oddly enough, does it by sensing RMS or Volume. RMS and Volume don’t track exactly. You can get into religious wars with defining volume, but RMS is a very specific electrical measurement, so it won.

Steve designed RMS Normalize to meet the RMS requirement in ACX. Until then, you had to get there by running around the barn and guesswork with other tools. You should probably trash your existing RMS Normalze and pull down a fresh copy.

Are you following Audiobook Mastering 4?

You are warned against mixing and matching effects in mastering. Mastering 4 may not look like much, it’s only three tools, but they clean up after each other. The addition of compression, for one notable tool, can mean some of the cleanup won’t get done, or it can create more damage than it clears.

Also be advised that you can fake out ACX Check. ACX Check needs at least 3/4 second of clean, pure Room Tone (background noise) to accurately measure Noise. Most natural speech recordings don’t have that.

It’s super critical to tell us what exactly failed. “It doesn’t pass ACX Check” doesn’t tell us enough. Mastering 4 will always give Peak and RMS exactly correct and the only variable is noise. There is no “It doesn’t pass RMS.”

What process did you use for the earlier books? I’ve said multiple times if you have a successful process, no matter who designed it, you should hold onto it with white knuckles.

Are you processing stereo voice, two blue waves? Did you get a better microphone/computer/interface? I see you’re using WinXP. Which Audacity are you using—all three numbers? You should probably be using 2.3.0.

https://manual.audacityteam.org/man/installing_and_updating_audacity_on_windows.html

Koz