My AVR is a B&K with none of the hi-rez processing so I will need the BluRay player to do that. So that's one set of 5.1 analog inputs but I will have second input from my trusty Sony SACD player. What would be the harm in simply Ying the two 5.1 inputs together to my B&K? Would that screw up the input impedance somehow? I have found only 1 5.1 audio switcher and it is very expensive so thought installing Y RCA adapters may do the trick. Opinions please...thx.