I have 5 songs from a artist called Au5 but 2 songs have multiple artists Au5 and Prismatic
When I move these 5 songs to my phone. I only find 1 artist "Au5" and Inside Au5 I find 5 songs.
I'm using Samsung Music, Pulsar Pro & Eon Pro Players. None of these player are showing that 2nd artist.
So how can I tag properly?
I mean, I want that the player will show those two artist separately on Artist Tab. So that when I play Au5, it will play 5 songs and when I play Prismatic, It will play only those 2 songs.
Please view the screenshots for better understanding.
So it is a problem of the player, right?
Apparently your player cannot cope with multi-value fields - so it may be an idea to merge these fields and separate the individual parts by "semicolon blank" (there is an action for that) so that you have "Au5; Prismatic" in a single ARTIST field - at least this is something that WMP uses to separate the display in a way that you described.
iTunes on the other hand simply shows the bare contents of artist.
So it is really down to the features of the player.
In general support for multi-value support for the artist tag is very poor. Most players expect only a single value here. So unless you use a player explicitly supporting this your best option is indeed to join the artists into a single value.
One advantage at least is that with this approach you can have more complex description of the artists, such as "Artist A and Artist B feat. C".
There is also a possible hybrid approach. E.g. Kodi supports a separate "artists" tag ("TXXX: ARTISTS" for ID3) which is supposed to be a multi-value field with all the artists. The normal artist tag then still can show a more descriptive text.
