How to handle multiple artists per music track?

[gnattu]

Use a tool that supports enter multiple entries for a single tag this will be handled automatically. For example, Picard with tag mode set to ID3v2.4 and you just add multiple values into a single tag field, all the entries of the artist tag will be added to the database.

If you don’t want to use such tools and really want to manually use a custom character to separate artists, you enable the use custom delimiter option on the Library and separate your artists use the specified delimiter.