What is "automatic movie mode" One of the new features listed in the iOS 6 release notes is


automatic movie mode for improved video sound quality


What does this feature do?
The new feature analyses the video that you are currently watching and it adjusts the Equalizer automatically so that the sound quality is optimal for the current movie scene.

Anyway many people think it's intrusive and that it actually decreases sounds quality. Others like it.
It's up to you I think.