I have the SA 8300HD box connected to a 5.1 setup through optical connection to the receiver.

I am curious about what the different audio settings for the 8300HD box are, and any recommendations on what I should set them to.

They are:
Audio:Range
-Wide, Normal, or Narrow

Audio:Volume Control
-Fixed, Variable

I have a vague understanding of what each of these are, but I'm not sure what the proper settings should be with my setup.