The discussion started with issues with the Artist being used instead Album Artist. When investigating that another issue was found: Picard tags the track artists in two different tags: Artist and Artists and. Artist contains only the name of the main artist while Artists contains multiple artists. The MusicBrainzArtistId tag then contains multiple ID's in the same order as in the Artists tag. From what I can see only the Artist tag is read by Taglib. So for Tiglib to support this multiple artists would need to be put in the Artist tag instead. Can you confirm this? See my screenshot in post 25 for more information.Taglib SHarp can handle Album Artists without any Problems.