It's a tiny algorithm listening to output volume and reacting to drastic changes via the VolUp/Dn buttons on your remote (figuratively): https://en.wikipedia.or

It's a tiny algorithm listening to output volume and reacting to drastic changes via the VolUp/Dn buttons on your remote (figuratively): https://en.wikipedia.org/wiki/Dynamic_range_compression https://en.wikipedia.org/wiki/Dynamic_range_compression "Night mode", if it is present, should also do this to a lesser extent. I am grateful for this feature in movies where light chit-chat is interrupted by window-shattering explosion sounds.