not all artists displayed

[simoncn]

The reason you are getting only Sol Gabetta in the Artist index for this album is that you have set the AlbumArtist to Sol Gabetta. MinimServer populates the Artist index values as follows:

1) If there is an AlbumArtist tag, use this value

2) Otherwise, use the Artist.indexFormat setting if there is one

3) Otherwise, use all the Artist values separated by commas

The value you are seeing on the Now Playing screen is created by your Artist.displayFormat setting. This is why it has a different format with '/' separators between the artist names.

The other album with Sol Gabetta and Hélène Grimaud presumably does not have an AlbumArtist tag value, so rule 3) has been applied.