Audition does not allow the user to embed ISRC codes into wav or MP3 files, this is only available for CD projects. If the user wanted to submit a recording to radio stations, for example, there would be no way for the author to track air play because ISRC codes are the only way of doing so. This is limiting users options, and it should be available given the option to add creator, and author among other very important metadata. ISRC codes are metadata, and again, it should be available across all options for creation in audition, not just cd projects.