A lot of music library managers (including good old iTunes) let you add a lot of various and esoteric song tag data as columns in the track list. The problem wa

A lot of music library managers (including good old iTunes) let you add a lot of various and esoteric song tag data as columns in the track list. The problem was always that the column arrangement that makes sense for one style of music doesn't make sense for another. One missing feature that I've never seen in a music library application is the ability to have "presets" for these column headers that you can easily switch between. So you can turn on the "classical" preset which shows Composer, Performer, etc., and you can turn on the "contemporary" preset which shows Artist and Album.