Advertisements Because this problem follows no repeatable pattern it would hard to fix for TiVo or anybody, when the sound goes out I can backspace and get the sound so the problem is most likely not on the hard drive itself, and the sound never drops on the HDTV itself, as I have the TV volume set low but not off, only drops on my surround sound system fed by an optical cable from my TV. I get no sound drops when watching from say my DVD or BD player, the audio is fed in the same way, from my HDTV via the optical cable. As an experiment I connected the optical cable directly from the Roamio to my surround sound system and got audio drop outs also. Go figure. When I use the Netflix App on the HDTV no sound drops ever, but when using the Roamio Netflix App I get some sound drops. The TiVo is the only common dominator in this sound drop problem.