I used the guide here for converting avi to dvd. instead of ifoedit i used tmpgenc dvd author to author my file for dvd. however, when i play the authored file, i get a loud hissing noise in the background that is not present in the source file. I tried using bsweet (did not know if that would help) to process the .mp2 file to clear up the hissing, but did not work. anybody know of this problem or can help? i'm going to burn it and see if i get the same noise in the dvd player. could be my computer. any help would be appreciated thanks!