Last updated: 2 November 2023
Peak volume refers to the point in an audio file which has the highest signal strength. It isn’t representative of overall loudness because it might only last for a millisecond. If it is too high though it can indicate that the signal is being clipped and distortion is being introduced, reducing the listening experience. This headroom is also needed to ensure files are successfully encoded.
Apple is the most influential body involved in the setting of podcast standards and they recommend that “true-peak value doesn’t exceed -1 dB FS”. We agree that the peak should be below -1 dB.
Header photo courtesy of @chairulfajar_
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 ⇢
Creating an account only takes a couple of minutes. You’ll soon be able to start uploading your own audio files and improving your shows.