from http://linuxpoison.blogspot.kr/2008/02/script-to-convert-wav-to-mp3.html

#!/bin/sh
# name of this script: wav2mp3.sh
# wav to mp3
 
for i in *.wav; do
 if [ -e "$i" ]; then
   file=`basename "$i" .wav`
   lame -h -b 192 "$i" "$file.mp3"
 fi
done