Use converter "Tag-Tag".Target field%ARTIST%Format string$regexp(%TITLE%,'^(.+?)\s*-\s*(.+?)$','$1')Prepend to existing value in artist field.Format ARTIST tag-field with:$regexp(%TITLE%,'^(.+?)\s*-\s*(.+?)$','$1')' '%ARTIST%Append to existing value in artist field.Format ARTIST tag-field with:%ARTIST%' '$regexp(%TITLE%,'^(.+?)\s*-\s*(.+?)$','$1')Remove first part from title fieldFormat TITLE tag-field with:$regexp(%TITLE%,'^(.+?)\s*-\s*(.+?)$','$2')
Anyway, pay more attention to the Convert function that you are using.
You can already split the filename to artist and title from there.
Just include the hyphen in the pattern: %artist%-%title%