A basic cableing question -- My brain ain't working today (1 Viewer)

I thought I knew the answer, but alas, my brain isn't cooperating.

I finally ordered a new receiver today to replace my old Technics Dolby Surround(circa 1988!) with a Denon AVR-883. I'm taking inventory of the cables I have, and once I have the answer to the following question, then I can buy my missing cables:

If I have a source that has a digital audio output, do I even need to connect the analog audio outputs to the receiver?

For example, LD to receiver? DVD to receiver? SAT box to receiver?

Here are model numbers, if that helps.
LD PIO CLD-D702
DVD PAN DVD-F85K
SAT SAM SIR-75

I really would like to eliminate any redundant cables (and keep a few bucks) if possible.

And I am working on my wiring diagram so it can be double checked; I may post it later if someone wants to "grade" it.

Thanks for everyone's help.

Bob