I just got updated to Version 6.76 on my 722, and one of the new features is the highly anticipated volume leveling (which is supposed to prevent drastic volume level changes between programming and commercials). It appears to be on by default (Menu - 6 - 7). However, with it on, the Mode option (on the same page) is restricted to only RF (Line is greyed out). RF mode compresses the sound, and according to the Help info, it is typically used for late night viewing. Line mode is typically used for normal viewing (and it allows Dolby Stereo Surround).
So, I'm not sure I will use volume leveling at this point.
So, I'm not sure I will use volume leveling at this point.