a long time after..... @Richard and others I didn't notice any compressed audio support in avisynth 2.0.x at all... Maybe something is to be done here ?? i would really like to use .avs files as a powerfull post-processing tool (resync audio, use cnr2, ect...) PS : i'm not used to audio-related things but i offer my help for cding :D EDIT : i know i can do it with GraphEdit but i don't see graphedit has an "all-around global and easy" solution (more a "desesparate and foolish" solution :D )