We thought it was just a brief, minor glitch,,,that Comcast would fix,,,in a month,,,or two. Yes, we have mentioned the problem to Comcast, many many times. Do you really think the FCC cares?
But it seems to persist. You can not turn your tv volume up above medium, or sitting next to the tv volume. So if you have a big open kitchen and dining area with lots of family and or guests , don't expect to be able to hear the tv. Or if you have a big family room ,,,or a converted basement,,,you can forget about hearing anything over the usual conversations on the Comcast cable tv expensive service.