I also had a problem with the AIX setup disc in 5.1. But when I finally got around to setting up my last two speakers for 7.1 everything came through fine. Out of the 112 blu-ray discs I have only 12 were recorded as 7.1. I'm not sure 7.1 or for that matter 9.1 on the new processors is worth much as an option for room correction. I have been anticipating more 7.1 content but I'm not holding my breath. And yes the music portion of the AIX disc sounds remarkable. But I'm still an old Beatles fan and really enjoy the new remastered versions of their music.