Unfortunately, we do not know of a single transcoding (file conversion) software that properly maintains the embedded information when converting a file from one format to another (WAV to MP3, for example). It is therefore recommended that you do embedding on all the formats (MP3 and WAV for example) in which you want to distribute your audio or video files right up front. Alternatively, you can do a separate embedding project on any new versions that you create in a different format down the road.