Sorting Track Artist and Album Artist by surname first

[simoncn]

You don't need anything in tagOptions. You just need to do what it says in the section that I linked. Please type into tagValue exactly what it says there (the last bullet). You might need the settings in the preceding bullets as well. I don't know why you have mentioned Composer as this isn't relevant to what you want to do.

Edit: In case it wasn't clear, the section I linked is titled 'Custom Artist index sorting' and doesn't include anything in the following section titled 'Using the reverseName option'.