In many cases Vocaloid albums (especially the rarer ones) aren’t recognized by any of the auto-tagging systems that use either Gracenote (WinAmp, Windows Media Player, iTunes) or FreeDB (foobar). In those cases you often have to apply tags manually. But why do something manually when you can automate it? Here’s a hopefully useful tip for using VocaDB to tag your Vocaloid albums in the way you want.
For this, you can use the “Download track info as CSV” button. If you press the button itself it will download tags in default format which assumes you want the Vocaloids listed in the title, or not at all. The default format is this because many media players and services such as last.fm are unable to group songs properly by artist if you have artists such as 164 feat. Hatsune Miku and 164 feat. Kagamine Rin in your library. Regardless, some people wish to tag their songs so that the Vocaloids are listed in the artist field. In that case you must press the down arrow next to the button and enter a custom format string, for example “%title%;%artist%;%album%;%discnumber%;%track%”. There are also plenty of other formatting fields such as genres that you can include as needed.
After downloading the CSV file, open the album in mp3tag (there might be other tagging tools that can be used). Make sure all songs are selected (you can press CTRL+A) and select Convert -> Text file – tag (or press ALT+4).
Find the CSV file and enter the mp3tag format string matching the format string from VocaDB. The default mp3tag format string is “%dummy%;%title%;%artist%;%album%;%discnumber%;%track%”, or if you used the alternate format string from above, the matching mp3tag format string is “%title%;%artist%;%album%;%discnumber%;%track%”. The possible field names are available in mp3tag’s context menu as well as their help page. Then just press Ok and you’re done! You can even use mp3tag to rename the files to match the tags.
We’re considering of adding native support for FreeDB API so that you could use players such as foobar to download tags with even less manual work, but for now this is the easiest way to tag your Vocaloid albums the way you want.