I have my 622 audio connected to my Denon 3806 using an optical cable. Most of what I watched on Dish came across in Dolby Digital up until 2 weeks ago. Now nothing. I either get 5 channel stereo or something else. My DVD player is hooked up the same way and when I play a DVD it is in Dolby Digital so it is not the Denon. I talked to Dish support this morning and they are sending out a new 622 today. Is it possible for the 622 to lose Dolby Digital processing.