How To Fix Loud Noise Floor in Audacity to Meet ACX Standards

There’s no substitute for a high-quality initial recording. Taking necessary steps to get the best recording possible saves time and a lot of headaches in post-production cleanup. There’s no substitute for a pristine recording. But sometimes that just doesn’t happen for any number of reasons. In this video I show you one way to clean up the noise floor in our ACX recordings using the Noise Reduction effect in Audacity.


  • 00:00 – Introduction
  • 00:15 – ACX Noise Floor Requirements
  • 00:35 – Example Waveform
  • 01:01 – Initial ACX Check
  • 01:30 – Setting the RMS Level
  • 02:30 – Applying the Limiter
  • 02:56 – Fixing the Noise Floor Using Noise Reduction
  • 04:56 – ACX Check for Noise Floor Passed
  • 05:17 – What is Noise Floor?
  • 05:44 – The Importance of Recording Good Audio
  • 06:24 – Wrap-Up Enroll Now! ACX Audiobook Production Using Audacity –

Hardware I used in this video (NOTE: As an Amazon Associate I earn from qualifying Amazon purchases):

Software I Used:

  • Audacity Version 3.1.3
  • Camtasia 2022
  • Auphonic Desktop Leveler

Other places you’ll find me: