That is similar to the way I have my Yamaha DVD-S1500 set up - optical1 to the DVD input, analog to the CD input (although in my case I've developed a preference for using the 990's DAC's for CD's, so I have optical1 assigned to CD), and 5.1 from the S1500 to the 7.1 input. Be aware, however, that only the video inputs (DVD and VIdeo1 through Video5) can be renamed - CD will stay CD and 7.1 Direct will stay 7.1 Direct. It would probably get pretty confusing to have three inputs with the same name, anyway - it would be impossible to glance at the front panel and know which of the 3910's outputs you were using.