I can record on the DVR but when I go to watch that channel, there is no sound with the box that is recording. I can watch it from a box that doesn't have the recording feature and it has sound with no problems. I have sound if I go to the HD channel but the channel I'm recording on has no sound. This just defeats the purpose of having the DVR set to record 2 shows and needing to watch one. How can this be fixed?