‘ACX check’ and ‘RMS normalize’ Plugins for Audacity

A short post about two ‘must-have’ plugins for Audacity (sure thing, if you are working with voice and going to publish an audiobook on Audible).

In a nutshell — what do they do…

  1. RMS-Normalize plugin — sets the target RMS (-18…-23, remember?) in a blink of an eye! If you are a newbie in this… man… you’ll love this one!
  2. ACX-check plugin — checks if everything is okay. Easy peasy…

Here’s an archive with two plugins for Audacity.

Do not trust..? Feed this site with these files and enjoy them!

If you want, read about *ny plugins.

Now, put them into this folder (depending upon the OS):

  • MacOS ~/Library/Application Support/audacity/Plug-Ins
  • Windows C:\Program Files\Audacity\plugins (might be you’ll have to use x86 path which is — C:\Program Files (x86)\Audacity\Plug-Ins)
  • Linux /usr/share/audacity/plug-ins, /usr/local/share/audacity/plug-ins, or ~/.audacity-files/plug-ins


  • Go to the Effect menu -> Add Plugins…
  • Find and select new plugins.
  • Click Enable.
  • Click OK.

Now the RMS plugin will appear in the Effect menu and the ACX plugin is going to be available under the Analyze menu.

Like I said, this isn’t going to be a large post — just a link to downloadable archive for those who struggle to find these plugins.

If you don’t know what to do with them, check this article!

If you need an advice or assessment, or you want me to prepare your audiobook for publishing, please don’t hesitate to contact me!

And always work with those you want to hug ツ

— Stan