If a DVD player is connected digitally to an AV amp, eg the Denon 3805, then I switch from playing a DVD in Dolby 5.1 to a Audio CD what happens with: 1) The volume (CDs have a much higher output, so does this mean I have to keep turning the volume up and down or can the input sensitivity be changed on the ONE digital input automatically recognising DVD or CD). 2) The surround sound mode (which comes on automatically, and can it be changed). Only thought of this potential problem now Ta muchly. PS anyone's experiences on the Denon 3805 versus Harman Kardon 630? And can the input names and sensitivites actually be changed on the Denon?