In answer to Maudia April 10. I have a mere 1800 CDs, about two thirds classical with many operas. I have added opera soloists on the Credit tab under Soloist. You can sort on this field. It does mean that someone like Dietrich Fischer-Dieskau appears as Artist for a Lieder recital and Soloist for an opera (where the "artist" would be the conductor), but you can easily do a search which will find all occurrences of his name or search any specific fields, as you wish. (I have also made a custom field for Accompanist for Lieder recitals).

My collection is on MyGenres at [url]http://mygenres.com/rogpo/[/url]
The Soloist field does not show up on this online version of the database.