I have a KD55XE7073SU television with a HT CT290 sound bar and have terrible lip sync problems. I have googled this problem and find that this is not uncommon. I have updated the software and the connection is by HDMI and optical and I can't seem to find any adjustment to change settings and sort this issue. I have downloaded the latest software and it didn't make any difference whatsoever. The picture quality is brillaint but the sound issue makes me wish I had never changed from my trust Panasonic set up. Can anyone make any suggestions as to how I can resolve this issue.