PRSS Audio Loudness Standard Webinar

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The PRSS will hold a webinar on Wednesday, January 28, 2015, from 2:00 PM ET to 3:00 PM ET to discuss its recently issued audio loudness standard. The webinar is aimed at providing clarity and detail on the loudness standard and to allow ample time for questions and comments.

All public radio producers and station personnel are welcome and encouraged to join the discussion. Interested parties have two options for participating:

  1. To watch the presentation, listen to the discussion, and have the opportunity to ask questions or make comments, please use the webinar option and register at this link:
  2. If you will not be at a computer at the time of the webinar, you may dial into a listen-only, muted phone line. To do so, dial +1 (914) 339-0030 at 2:00 PM ET on January 28. You will be asked to enter the Access Code, which is 989-568-914 followed by the # key. You will then need to press # again. Please remember that with this option, you will be muted and unable to comment or ask questions.

The overall agenda for the webinar is as follows:

  • An overview of the PRSS audio loudness standard
  • Information about how the PRSS will monitor program loudness
  • A sampling of hardware and software tools that producers can use to assist with compliance
  • An opportunity to make comments and ask questions.

As announced in December, the PRSS has issued a new broadcast standard aimed at normalizing audio levels among all programs it distributes to stations. A standard has been devised (see below) with the objective of improving the public radio experience for the listener. Later this year, the PRSS Network Operations Center will begin to monitor all program levels and notify producers whose content does not meet the standard.

The PRSS Audio Loudness Standard has been set at -24 LUFS, ± 2 LU, with audio peaks = -3 dBFS for sample peaks or = -2 dBTP for true peaks, meaning producers should strive to set their programs’ audio levels at -24 Loudness Units Relative to Full Scale (LUFS), with a deviation range of plus or minus two Loudness Units. The standard also sets an audio peak at or below -3 decibels relative to full scale if using a peak program meter (PPM) or -2 dBTP if using a true peak meter (TPM). (The full PRSS Loudness Standard is available for review at
A website has been established at to store all training materials and communications resources. As new documents are finalized, they will be posted to the site.

If you have any questions, please contact the PRSS® Help Desk at or call 800.971.7677.


Posted: January 7, 2015