I tried it as a format value in the %artist% field, didn't do what I was expecting. I've attached a screenshot for clarity. I think I didn't provide all the info correctly and I apologize for that.
So with the attached screen shot, the arrows show the two different scenarios I have.
So track #3 I would like to end up with:
HAILEE STEINFELD FEAT. ALESSO & FLORIDA GEORGIA LINE & WATT
and for track #7
MATY NOYES FEAT. TESTME
I see what your example does, I "think" it required the action format value in the %artist% field. If I was incorrect, is there something I should do differently?
For now ... the given proposal does what you have wanted by your request.
You may apply the given formatstring within the action "Format value" or within the converter "Tag-Tag", the converter offers a preview.
Please define the new problem in other words and give a proper example of a possible failure.
DD.20171002.0747.CEST
Here is a coding variation of the first proposal ...
I recall reading someone saying Dave and I "thought" you responded to that name, I of course, could be very wrong with my assumption or poor memory recall, and I guess it just stuck.....I apologize if I called you by an incorrect name.
I ended up realizing what I was doing wrong with your first post method.
I stuck %artist% in the format field chooser instead of ARTIST.