Hi I am not very technical, so please excuse me as I do my best to explain. I have the following codec's installed: K-Lite codec pack AC3 filter I used to use Cucusoft to convert and I found that this took too long, so I searched for something quicker and I came across Winavi Video Converter. I converted some AVI files to DVD and I burned the resulting VOB files using Nero. When I played the disc back, I got no sound, the picture was fine but I had no audio. I have adjusted the AC3 filter to 'loud' (20dps?) and this has made no difference. I would appreciate it if someone could help me please.