I am getting a lot of "garbled" audio on some of the channels for the past few days. My cable box is a DCX3500-M. I have noticed this particularly on the US time shift channels such as the Detroit CBS channel on channel 86 and on CNN on channel 17. It sounds as if there are repeated millisecond beaks in the audio that make it sound garbled. The garbling is not constant but seems to come and go frequently.

I'm wondering if this is a network wide issue, a neighborhood issue or just my cable box. Are you aware of any issues with the audio on these channels?