2 ms·

I'm all for this but unclear what "average maximum" refers to.

• _delirium 16y ago
  The text of the bill doesn't contain any actual definitions (http://www.govtrack.us/congress/billtext.xpd?bill=s111-2847 http://www.govtrack.us/congress/billtext.xpd?bill=s111-2847), but instead instructs the FCC to make mandatory the document Recommended Practice: Techniques for Establishing and Maintaining Audio Loudness for Digital Television (A/85), published by the Advanced Television Systems Committee, a standards body. That document is open-access here: http://www.atsc.org/cms/standards/a_85-2009.pdf http://www.atsc.org/cms/standards/a_85-2009.pdf It contains a method of setting the loudness of a program via a volume control, which is based on some sort of average of the underlying waveform (not peak sample value), and then "recommends" that during changes between program and interstitial content (like advertisements), the same loudness setting be used. It seems broadly similar to something like Replay Gain (http://en.wikipedia.org/wiki/Replay_Gain http://en.wikipedia.org/wiki/Replay_Gain), which sets volume based on an average that's intended to capture perceived loudness.