Does the database currently store the Comment Field? If it does that would give 254 potential characters of space for adding free text like performers and soloists or anything else useful. I had previously asked in the wish list if there would ever be searching on free text in the comment field. This would sound like another potential application for that capability. I still hope that feature might be added and have been adding long comment fields to the ID3V2 tags in anticipation of being able to use that info some day.

Tom Hitchcock