I got a Sony STR DH 720 with Sony Internet TV & Blu-ray Disc™ Player Powered by Google TV box connected with HDMI. like shown here http://esupport.sony.com/docs/btv-manuals/flyers/Flyer_AVReceiver_connection/4270510112/img/4270510112_01.jpg Just bought and installed Polk audio in wall speakers in a 7.1 set up. I had the STR in AFD mode but was not happy with the sound quality and it would not transmit in 7.1 but rather 5.1 when playing bluray disc with 7.1 audio like Transformers Revenge of the Fallen. I tried all different settings on the STR720 but no luck, so I tried optical cable with no better results. So I started messing with the blu ray player audio setting and one audio setting fixed my problem. It was the BD audio mix setting, it was turned on by default, as soon as I turned it off and start playing the bluray with AFD auto setting on the reciever the surround system switched to True HD audio 7.1 Thought I'd share this in case anybody else has similar problem.