setting ignore.sort in the All Artists tag?

[simbun]

It could be achieved with tagUpdate, and I think relatively easily if you're using mp3tag.

Essentially we'd create another tag (internally to MinimServer) that has the value Oscar Peterson when he's the track artist but not the album artist, which you could then add as an index called something like Accompanying Artist (which we define as Track Artist and not Album Artist).

The code would look like:

Code:

@ARTIST=Oscar Peterson
+ACCARTIST=Oscar Peterson

@ACCARTIST=Oscar Peterson
&ALBUMARTIST=Oscar Peterson
-ACCARTIST=Oscar Peterson

Which basically equates to:
If the Track Artist is Oscar Peterson (@ARTIST=Oscar Peterson) then add a new tag called ACCARTIST with the value Oscar Peterson (+ACCARTIST=Oscar Peterson).
If the new ACCARTIST tag contains the value Oscar Peterson (@ACCARTIST=Oscar Peterson) and he's also the AlbumArtist (&ALBUMARTIST=Oscar Peterson) then delete the ACCARTIST tag value (-ACCARTIST=Oscar Peterson).

It may look a bit strange, but we can only use "equals" logic, not "not equals".

Assuming that you'd only want to do this for album artists (as the list of track artists can be huge) then the generated script wouldn't be too big either. You'd obviously have to update this script as part of your maintenance (as new album artists are added).