id3.sh

IFS=";;;" 
function tag() { tail -c 128 "$1" | head -c 3; }
function title() { tail -c 125 "$1" | head -c 30 | rtrim; }
function artist() { tail -c 95 "$1" | head -c 30 | rtrim; }
function album() { tail -c 65 "$1" | head -c 30 | rtrim; }
function year() { tail -c 35 "$1" | head -c 4 | rtrim; }
function comment() { tail -c 31 "$1" | head -c 28 | rtrim; }
function track() { tail -c 3 "$1" | hexdump -ve '/1 "%02i "' \
                   | awk '{ if ($1 == 0 && $2 != 0) print $2" " }'; }
function genre() { tail -c 1 "$1" | hexdump -ve '/1 "%03i"'; }

function rtrim() { sed 's/\([^ ]*\) *$/\1/'; }
function filt() { tr -d '/*?'; }

while [ $# -ge 1 ]; do
	file=$1
	[ "$(tag "$file")" == "TAG" ]
	artist="$(artist "$file" | filt)"; 
	album="$(album "$file" | filt)"; 
	title="$(title "$file" | filt)"; 
	track="$(track "$file" | filt)";
	#echo "album:$album";
	if [ "${album:0:1}" = " " ] 
	then
		echo "$artist:$album";
	fi
	shift 1;
done