Briefly on the Audyssey thing, the first mic position is to be at your primary listening position, and it determines the basic level/delay settings. I get the best results with the rest of the mic positions surrounding my main seat in a radius of about 1.5 to 2 ft. All at ear level and I use a mic boom for ease of placement (got it "free" with an amp purchase a while back), a tripod can work well, too. A nice quiet time to do it helps, altho not generally a deal killer....altho once in the middle of the Audyssey run I had a flock of birds start making a racket and that calibration did sound odd afterwards so I re-ran it. There are good guidelines in several places, avsforum and hometheatershack fora come to mind. I have an older Denon with XT32 and wish I could use the app, I'd definitely get it....