Artist or Artists for multiple Artists

[simoncn]

As you suspected, the values in the All Artist index are taken from the Artist tag, not the Artists tag.

It is likely that the semicolon you are seeing here is not a real semicolon but an indicator from Picard that there are multiple values for the Artists tag. Multiple-value tags are supported by ID3v2.4 and by MinimServer.

Assuming the above is correct, you can set the aliasTags property of MinimServer to:

Artists:-Artist

With this setting, if a file has an Artists tag with one or more values, MinimServer treats these values as Artist values and ignores any Artist tag value(s) in the same file. For files without an Artists tag, MinimServer reads the Artist tag value(s) as usual.

Using aliasTags avoids the need to retag your files.