I've been using coreconverter command line mode for a while now to convert mp2 to mp3 (I work for a radio station and the conversion is part of an automated script to deal with network audio uploaded to our ftp server). I'm working on another tool to apply ReplayGain without re-encoding the file (different problem). SO... is there such a thing as a null encoder or a way to pass the source file through without re-encoding it? I just need to use the replaygain dsp in command line mode. I remember reading something about this before but I can't find any threads that talk about it now, or maybe it's just been too long and my memory is confused. Thanks for the input.