I had a problem with the DST 3000 losing audio on 5.1 material, unless I toggled the DD (on/off on/off on/off) option in the DST 3000 menu the 5.1 material would be silent. As soon as I changed the channel & went back to the same (DD) channel the 5.1 material would again cut out. My local dealer has sold four of these units & I am the third to bring in an exchange. The salesperson mentioned that all three returns were for different (defective) reasons. He also said when talking to the Toshiba rep about two of the units, she gave him authorization #'s for the returns, NO QUESTION'S ASKED! Salesperson said its very unusual for Toshiba to act so quickly on defective returns. Well, I get a fresh unit from today's shipment, set it up & have the same problem. My connections are correct. I called Toshiba & could have called my Grandmother & gotten more help. Having a 56H80 I really wanted to stay with a Toshib box. So much for wanting.