It has been brought to my attention that when using bitstream from my blu-ray player to my 605, that you can't use Audyssey. Alternatively if you set the blu-ray player to LPCM over HDMI, the amp receives the multich and Audyssey runs. Apparentely its something to do with not enough processing on the amp to do both? I've always had it this way as I prefer to have the amp doing the decoding, but I am now thinking that it would be better to have the blu-ray player doing the decoding and outputting LPCM over HDMI and be able to use the Audyssey equaliser settings on the amp? Any thoughts?