#!/bin/sh

# Filter out existing tracks

tmp=`mktemp /tmp/flt.XXXXXX`
find "$@" -type f -name '*.mp3' |
xargs -I {} basename -s.mp3 "{}" |
sed 's/\(.*\) - \(.*\)/\2\t\1/' > $tmp

fgrep -vf $tmp
rm $tmp