I would like to separate the logical view of a multi-disc album from the physical view. Because of that the Track field should use all tracks from all discs: the first track from the first disc would be 01/28 and the last track of the second disc would be 28/28 in case both discs have 14 tracks. I managed to get this with the auto-numbering wizard without any problem.
Now I would like to keep the physical view for the file names, so the first track from the first disc is called  01 - title - artist and the first track of the second disc should be  01 - title - artist and the last track of the second album should be  14 - title - artist.
My current rename format is
['['$num(%discnumber%,2)']'] $num(%track%,2) - %title% - %artist%
So how can I get the track number being reset for each additional disc?