Hi Stephanie:
You may be on to something here. Currently, when I press the mute button on the Cisco remote, the red light indicator on the remote does come on the "TV Button" on the same remote. Please supply me with instructions on how to reprogram the remote to mute the cable box, rather than the television's audio. But please keep in mind, the "buzzing noise" only occurs when I pause either the DVR, or live television. Obviously, and currently with the button being programmed to mute the television, the "buzzing noise" does disappear, but, I shouldn't have to mute either the box or the television as a permanent fix. Please advise. Thank you.