I have a HUMAX HRT800 (80 hr Tivo with DVD recorder) hooked up to a Yamaha Receiver to a Cox High Def DVR cable box. In recorded programs on DRT800 the lips of people speaking are not in synch with the audio through my surround sound speakers. Tweeter who installed my setup with a Samsung 50" DLP projection TV has been out twice making adjustments and says the problem must be with the HUMAX box. Is anyone else having this problem? How do I troubleshoot or preferably fix this. It is annoying to spend all this money and have a relatively basic problem such as this.