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Loudness (LUFS)

Last updated: May 23, 2022

You may have noticed having to turn up the volume to listen to a particular podcast but then have your ears blasted when you receive a phone notification or your player moves onto the next episode in the queue. By adhering to loudness standards you are protecting your listeners’ hearing and ensuring a consistent and pleasant experience. Arguably getting loudness correct is more important for podcasters than say TV producers due to the fact that most people are listening to podcasts with headphones/earbuds and often the volume has to be louder to compensate for noisy environments. Therefore audio that is too quiet can be more damaging than audio that is too high.

LUFS (also known as LKFS) is a way of measuring average audio levels using the decibel (dB) scale. There have been several mechanisms used to gauge the loudness of an audio track over the years. Just taking the “True Peak” value is not representative and is easily biassed, RMS (Root Mean Square) is better as it averages over the time period but is still heavily influenced by things like gaps of silence. LUFS goes a step further and aims to represent loudness in a way that humans perceive it. It has been adopted across TV, film, music, and radio stations for many decades now.

Apple is the dominant authority when it comes to podcast standards and recommends “-16 dB LKFS [LUFS], with a +/- 1 dB tolerance”. Factoring in the tolerance, our recommended range is -17 to -15 LUFS.


Most DAWs have a filter to alter volume to a chosen LUFS target. We’ll show you how to make this adjustment using the most popular tools. We’ll be updating this page with more solutions as time goes on and we figure them all out ourselves. If you tool isn’t listed here and you know it supports this feature, please let us know so we can add it.

Audacity

LUFS Loudness Normalisation is a relatively recent effect added to Audacity in June 2020 so you may need to upgrade if you have an old version. You’ll need version 2.4.1 or above to use it.

First select your track(s) then from the top menu choose “Effects” and then “Loudness Normalization”. A dialogue will appear. Select “perceived loudness” from the dropdown options and enter “-16” as the LUFS value for podcasts.

You can read more in Audacity’s own documentation for the feature.

Logic Pro

Reaper

Adobe Audition

DaVinci Resolve

Whilst you’re here…

Audio Audit is an automatic benchmarking and proofing tool which checks the quality of your podcast MP3 files, giving you peace of mind before you publish.

It checks things like loudness, silences, restarted sentences, encoding, swearing and metadata.

Learn more ⇢Screenshot of an Audio Audit report

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