Thank you both for the the info; I'm up and running
I by this I mean all I have to do is this:
1] Export ARTIST info from all files with this code
$filename(txt,utf-16)
$loop(%ARTIST%)$puts(list_all,$get(list_all)', '%ARTIST%)$loopend()
$puts(list_all,$replace($get(list_all)
,' cond. ',', '
,' feat. ',', '
,' interp. ',', '
,' voc. ',', '
,' vs. ',', '
,' & ',', '
,' + ',', '
,' ++ ',', '
,' *2',' '
,' *3',' '
,' *4',' '
,' *5',' '
,' *6',' '
,' *7',' '
,' *8',' '
,' *9',' '
,' *10',' '
,' *11',' '
,' *12',' '
,' *13',' '
,' *14',' '
,' *15',' '
,' ',' '
))
$puts(list_deduped,$regexp($regexp($regexp($get(list_all),'(?:(?<=,)|(?<=\A))\s?([^,]*),(?=.*?(?<=,)\s?\1(?=,|\Z))',,1),'(,\s+)',$char(13)$char(10)),'^[ ,]+|[, ]+$',))
$get(list_deduped)
2] Open the list in Notepad++
3] Use the TextFX plugin as desrcibed in here: http://stackoverflow.com/questions/3958350...rows-in-notepad
4] Scroll down to the bottom of the list to see the number of individual artists
The only problem it is my third TXT editor that I have to use [for different very specific purposes]; and of course the fact that procedure is finished outside of Mp3tag. But better this than having empty folders or puting markers in them. And also, as I will use it only a few times in a year, it won't be a drag