Linux

You can probably do it in one line of bash!

for file in *.mp3; do [ "$(tag "$file")" == "TAG" ] && \
    (  artist="$(tail -c 95 "$1" | head -c 30 | rtrim; "$file" | filt)"; \
       album="$(tail -c 65 "$1" | head -c 30 | rtrim; "$file" | filt)"; \
       title="$(tail -c 125 "$1" | head -c 30 | rtrim; "$file" | filt)"; \
       track="$(tail -c 3 "$1" | hexdump -ve '/1 "%02i "' \
                   | awk '{ if ($1 == 0 && $2 != 0) print $2" " }' "$file" | filt)"; \
       dir="$artist - $album"; \
       newfile="$track$artist - $title.mp3"; \
       mkdir -p "$dir"; \
       mv "$file" "$dir/$newfile"); \
    done

You can probably do it in python, for sanity's sake.

https://wiki.python.org/moin/UsefulModules#ID3_Handling