I have a folder with a hierarchy of subfolders with different media file types in it--mostly MP3 and WAV. I use MP3Gain to add the tag for setting the playback level of the MP3 files, but I want to use Sound Forge to process the WAV files. If I knew for sure that Sound Forge would not re-encode the MP3's, I'd use it to modify their gain as well, and the rest of this message would therefore not be necessary. In the batch converter, there is no option to choose only one media file type. You can either add one file at a time to the list of files to be processed, or add an entire folder and its subfolders. If you choose the add folder option, you don't get to choose which file type is, or file types are, processed. Does anyone else see this as a drastic oversite, or am I missing something in the setup process for the batch converter?