Multidisc help

[simoncn]

You need to add DISCUBTITLE to the list of "extended" fields shown by Mp3tag.

In Mp3tag, select View, then Extended Tags. Click the Add field button. This shows a dialog where you can enter Field and Value. (You have already got this far.) Type DISCSUBTITLE into the blank space for Field and type the value that you want into Value.

After you have done this once, DISCSUBTITLE will be available in the drop-down list for Field.