OTA transmission comes through TV speakers without a problem. When I switch to external speakers the sound periodically becomes garbled or cuts out completely. The quick fix is to simply change channels back and forth but that's not a real fix. The Sony TV isn't equipped with ARC HDMI so I have to use an optical connection. If it helps I have a Sony KDL-46BX450 tv and Sony BDV-E385 HTiB. Could it be some kind of interference? I have a similar Sony system in another room connected to the same antenna and it hasn't any problems. When I had satellite there wasn't any problems with audio. I did ask a Sony tech from their website and all he could suggest was to try a different optical cable. Any ideas?