Audio problems

I am still having audio problems with Channel 7, both OTA and Satellite. I have an optical digital hookup for the sound. Desperate housewives sounds awful. The voice track is fine, but the backround music is very, very, choppy. This problem does not seem to occur on other channels. Anyone else experiencing this audio problem??? I have had this problem at least 4 or 5 times on Desperate Housewives. I don't think the problem occurs on SD broadcasts, only high def Satellite or OTA.

I have intermittent loss of audio, split second, on all channels. SD using (UTV, 2 Tivos, RCA450). This has been going on for over 2 wks.

Of all of the networks, our ABC station seems to have the most audio problems. Lip-sync being my biggest problem. Local news and network both. It is good that on MNF the lip-sync does not matter.

And the intermittent loss of audio (lip synch) happens mostly on primetime