Let’s recap: as labels, if you retain copies of master audio, these days it’ll inevitably be high quality WAV files. LIST-INFO was the original specification for WAV audio and AVI video metadata, published in 1991, and (basically) hasn’t changed much at all. Since then, ID3 tags have become the de facto standard for MP3 metadata, and as we mentioned previously, certain programs can export key fields of both metadata formats into WAV files.
So why are we concerned with editing the LIST-INFO metadata, if two different kinds can be embedded at once? Part of it boils down to the fact that WAV files are more than likely the final audio file you will deal with as a label, so it isn’t unreasonable to acquiesce to the specifications of the file format, especially if you intend to continue working with it or need it stay usable in the future. In support of this, BWF MetaEdit can import, edit, embed, and export metadata elements in WAV audio files, export metadata as separate files, as well as report errors that arise from the construction of WAV files.
Embedding your metadata in batches is actually a pretty simple process in BWF-ME. Select “Open Directory” from the File menu and select your folder of WAV files to work on. The Tech button on the lefthand side will show you technical metadata embedded in your files; Core is where LIST-INFO metadata lives. To start batch embedding metadata, choose “Core Document (one global CSV file)” from the Export menu:
Your exported CSV file should have the file path to every WAV file in Column A. Columns B through P represent BEXT Audio Metadata, some which may be auto-generated depending on the program that created your WAV files. Today’s post will ignore these Columns, and focus from Column Q onward, which are LIST-INFO metadata fields.
It’s important to know what the LIST-INFO fields represent, since they are identified only by their chunk IDs. We’ve included a helpful breakdown below; full definitions (along with guidelines on how to format your metadata) can be found here.
Another useful tool in BWF-ME is the option to generate, and then verify, MD5 hash values. For the uninitiated, MD5s are used to verify data integrity, especially in the software and file-sharing communities, providing some assurance that transferred files have been downloaded intact. For labels, embedding MD5 hashes in your WAV files can provide a low level of assurance that your master audio has not corrupted.
To switch on this feature, click the preferences button and tick the appropriate MD5 option boxes: