Hi, I have my PS3 linked to my SONY DH820 AV receiver via HDMI. When I play blu-ray discs the sound is fine and I can select any sound field. When I watch bbc iplayer through the PS3 I can only listen to the sound on certain sound fields. (HD-DCS, concert, sports, hall, jazz, stadium). None of these are particular good for the content I waNT to watch. I have adjusted the sound settings to bit stream but this hasn't made any difference. Would really appreciate some guidance if any one understands what I'm doing wrong.