Hello, I know little about the 722K so apologies. I recently hooked up a Sling adapter to my 722K, the Sling works over the net but I lose audio with the TV at home while Slinging. I'm using a wireless usb device for Broadband. Everything seems fine with the exception of the audio in the TV. My 922 never had this issue. Any help greatly appreciated. Oh yea I am mirroring another TV from the 722K with HDMI if that would matter.