When the program reads an ID3 tag with a slash in the
artist field (AC/DC is the only example I can think
of), the filename comes out as AC, since it knows you
can't have slashes in a filename. When reading the
song title, it'll add a comma, but this doesn't fit as
well for the artist. Perhaps a dash could be
substituted, or the slash could just be removed and the
two parts concatenated (AC-DC or ACDC).