MacMini,
... If I had a displayable composer tag, I wouldn't bother filling it for pop music, so it would be easy to filter it out to list music by composer.
rsbrux, what you describe would work if you enter info manually.
The problem arises when you pull album info automatically. For example, in QT or WMP, when you get album info from the web, it is often extensive, and it often fills in the Composer field for pop tracks.
Which means, one will have to go in and manually delete the composer info for each pop track. Also, there are some who may actually care who the composer of Genie In A Bottle is
Anyway, it would be great if there can be an additional field implemented, whatever they call it.
Cheers.