From Audyssey:
"
Unfortunately, TV stations are trying their hardest to push the limits and this is often made worse by locally injected content (e.g. local ads). There are three presets for Dynamic Volume. Denon calls them Day, Evening, Midnight. Midnight is the one that more aggressively minimizes the differences between loud and reference (dialog level).
Hopefully the Midnight setting will get you closer to what you are trying to achieve."
link:
http://ask.audyssey.com/entries/91634-dynamic-volume
