I have been having the same audio drops... read on another forum http://forums.xfinity.com/t5/Non-X1-Service/audio-cuts-out-for-1-2-seconds/m-p/907571#M24803. They claim this was the fix... read quote below
"It has been 48 hours since Comcast crew adjusted nodes, amplifiers etc. in the street.
So far my sound has been flawless, no drop- outs or missed words. I will wait another week and watch more
channels just to be sure the problem has really disappeared for good.
So my advice to anyone experiencing the symtom of the sound cutting out for 1-3 seconds, call Comcast
have them come out and check/adjust the nodes and amplifiers in the cable boxes OUTSIDE your home
and even farther down to the next junction or two
this is where the issue is apparently. Unless my problem comes back, this will be my last posting on this
issue. good luck to you all......."
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