If I'm not wrong, taglib-sharp supports the possibility to have multiple artists (thik of a collaboration of two or more stars).

Let's have an example: a hypothetical song called "Beautiful_Song" which is performed by "Artist_A" and "Artist_B.

I would like the possibility to:
- add multiple artists when you edit song tags, so that I can choose both Artist_A and Artist_B as the song artists (currently only a gtk text entry is present)
- show the album/track in both artists, so that when you filter songs by Artist_A you see Beautiful_Song, and the same when you filter by Artist_B