I have a Samsung TiVo box, and optical cable connected to my Sony blue ray dvd system. HDMI cables from the TiVo to tweet, and another one from dvd to telly. I used to get the 5.1 audio to the speakers but a while ago it stopped working and I was having to just use the rather tiny and tinny TV speakers. It was a bit of a faff to get at the cables but looked this morning and nothing seems to be the problem. I will change the optical cable between TiVo and did, but suspect that this is not the problems. I have heard there is an issue with the audio from Samsung TiVo...is this the case, or does anyone have a solution?