Designed to apply rules and filters to folders and subfolders of MP3 files. For instance, you could ask for a list of all MP3 files whose ID3 v1 tags differed from the ID3 v2 tags (taking into account the limited nature of v1 tags).

Will also allow you to define a standard group of ID3 v2 tags which must or must not be in each MP3 file and produce a list of non-conforming files.