I‘ve been renaming all my music files with this format:
%albumartist% - %album% - $num(%track%,2) - %title%
When I did this with petal black rock by WILLOW, it just automatically added the featured artists after the title in brackets:
Lovely, just how I like it!
I then went to repeat this with Flower Boy by Tyler, The Creator but all the featured artist names were missing. I added them manually, applied the same format but this time the featured artists did not appear anywhere in the file name:
Why did it work on one album but not the other?
Is it because I added the featured artists manually?
Does anyone know how to make it work like it did on petal black rock?
Thank you in advance <3
MP3tag does not add or remove any data automatically - you have to trigger it or use a dedicated function.
I do not see a featured artist in the tag data of the set of files in the second screenshot (Tyler, the Creator)
Thank you for replying so quickly!
The featured artists appear in the “Artist” tag field, separated from the main artist by a semicolon, same thing on both albums.
I didn’t do anything to get the “(feat. xyz)” formatting on the first album, just changed the format from
%artist% - %album% - $num(%track%,2) - %title%
to
%albumartist% - %album% - $num(%track%,2) - %title%
and boom, the featured artists appeared in brackets after the title.
I’ve been clicking all the buttons trying to figure out how that happened but couldn’t find anything. Do you have any ideas to how this was triggered/what function made it happen?
No. As I said: MP3tag does not do anything automatically.
If you tell us which data you use and what it should look like after the transformation, you might get useful suggestions.
Sorry I’m not sure what I need to tell you, I’m becoming more knowledgeable about computer and file stuff but I’m still a complete noob… I want to name all my files as “albumartist - album - tracknumber - title (feat. artist)”
As I said, for the first album all I did was change the format string from
%artist% - %album% - $num(%track%,2) - %title%
which appeared as “WILLOW; Kamasi Washington - petal black rock - 04 - play”
to
%albumartist% - %album% - $num(%track%,2) - %title%
which appeared as “WILLOW - petal black rock - 04 - play (feat. Kamasi Washington)”
I did nothing else to trigger this but I like it and would like to reproduce it.
If you look closely, the title "play" already has
in the title field. And this data is used for the filename as you set
In which file would you have further featured artists? I only see one in "Omnipotent"
OOOOOH my god how did I not see that??? Thank you so much, now everything makes sense!!! 
