Picture this: you have two DVI or HDMI sources and two (or three) component video sources, and you want to connect all four (or five) through your processor. With the 990, you could assign any of those four (or five) sources to any of the six video inputs (DVD and Video1 through Video5) and then re-name those inputs.
Sorry to butt in, but gonk, I'm having a hard time picturing this.
I understand the first part in that you can connect four separate sources to the processor, but can you clarify the assigning part?
If I understand you, I could say, hook up my Denon 2910 DVD player to the 990's DVI 1 input and then assign the "DVD" input to the DVI 1 input and then rename it to something like "DENON"...?
EDIT: Reading the 990's manual online helps!
Also, how many letters do to the renamable inputs allow?