You can can download the ACX Check plugin for free here on the Audacity website. This can result in having your audiobook rejected (temporarily sent back for revision) which feels embarrassing and will cause delays in publishing your audiobook. Without the ACX Check plugin, there’s really no simple way to know if your levels are compliant with the ACX requirements or not. The ACX Check plugin let’s you see where your audio levels are before you submit your files so that you can adjust them if you need to.

have the exact same requirements because they also distribute audiobooks through Audible and Amazon.

Most other audiobook publishers like Authors Republic, Findaway Voices, etc. peak levels no higher than -3dB, RMS between -18dB and -23dB, and noise floor no higher than -60dB.

If you have read through the ACX Submission Requirements for submitting audiobooks to Amazon, Audible and iTunes, you may have seen that they have specific requirements for the peak level, RMS, and noise floor for each of your recorded chapter files. This free plugin lets you analyze a segment of your audio track and measure your audio levels (peak, RMS, and noise floor). That plugin is called the “ ACX Check Plugin.” If you don’t know what a “plugin” is, it’s just a file that gives the Audacity program additional functionality.Īudacity offers dozens of additional plugins on their website here, however, there’s really only one Audacity plugin that is essential for producing audiobooks that meet the ACX Submission Requirements. However, if you’re just getting into audiobook recording and have decided to give Audacity a try, there is one plugin that you are going to need to download in order to get the most out of Audacity.

Audacity for beginners 2020