This function is used to renumber albums which have multiple discs into a single disc where every track has consecutive track numbers.
The function works as follows: All files in the selection are internally sorted by album, disc number, track number. Once sorted, the files within each album are renumbered from 1. The disc number of every file is set to 1 of 1. You can always erase the disc number with the Clear action step.
This function is not valid during Grouped execution