Id3tool is an mp3 tagger.
brew install id3tool
Run id3tool $file to get the tagged information for the
file:
$ id3tool illmatic\ -\ 01\ \ -\ Nas\ -\ The\ Genesis\ \[Y6ElJoP_2S8\].mp3
Filename: illmatic - 01 - Nas - The Genesis [Y6ElJoP_2S8].mp3
Song Title: The Genesis
Artist: Nas
Album: Illmatic
Track: 1
Year: 1994You can tag it like so:
id3tool "$f" -y "$year" -a "$album" -r "$artist" -t "$track_name" -c "$track_number"