ok here's the deal...I d/l many avi or mpeg movies and put them on dvd. The movies are usually out in the movies now so they arent the best audio/video quality. My question is how do I either completely get rid of the hissing in the background or just lessen it so it's not as noticable. The steps I take are as follows....after I download the file I convert it to dvd format by using dvdsanta then I either burn it using nero or roxio. What steps should I take in between to enhance the audio quality and preferably convert to dolby 5.1???