I know this has probably been addressed already. I just got my HD channels hooked up and I have noticed the sound is lower than the SD channels. It was the same way on my OTA but I thought it was because of the antenna. But even ESPNHD, DHD and all the others are like that too. I am running an optical cable to my receiver then using RCA cables over to my TV (I don't always watch TV through the stereo). Can someone please help?