I was switching forth b/w several football games b/w D*'s MPEG-4 local channels and what I could pickup OTA from other cities, and noticed that the audio for most of the Dolphins/Ravens game sounded like the announcers were in a tin can. The audio for the other games I was watching (Eagles/Cowboys and Steelers/Jags) was perfectly fine. The tin can affect (as I call it) seemed to come and go, but where there most of the time. I do not have a surround system, but solely use the TV's speakers. I have the SoundSound option turned off in my HR20's setup. Any idea why the tin can audio? I have also experienced this phenomenon on certain commercials, too.