The 3D one is easy.
Based on the Denon customer help section, this is related to HDMI versions and a recent firmware update. http://denon.custhelp.com/app/answers/de...3d-pass-through
Either using the HDMI feed through your receiver will allow for 3D content on your tv, or it won't. Test out a 3D content movie running HDMI through the receiver then into the tv. If 3D works, then it works.
As for the Audyseey dynamic volume, i'm not sure as much exactly what it does.http://www.audyssey.com/technologies/dynamic-volume
There should be a setting to turn this on and off. Try both and see which you prefer.
Now if this is a volume control for sound that increases and decreases throughout a tv or movie signal, i would LOVE to use this on Spike TV channel where the SPL are constantly going up and down and then blast loud during commercials.
It is the only channel we receive that does this so flagrantly that one needs some type of control on the damn thing.