Mine

#! /bin/bash
# renamer

for file in *.mp3;
do
  name=`awk -F- '{print $3"-"$4}' <<< "$file" | sed -e 's/^\ //'`;

  # get bitrate
  rate=`id3info "$file" | grep Bitrate | sed -e 's/Bitrate\:\ //g' -e 's/KBps//g'`;
  # check we have a bitrate to work with or dont do the calculation
  if [ "$rate" != "" ] 
  then 
    if [ "$((rate > 128))" = 1 ]
    then
      `lame "$file $name"`
    else 
      echo false
    fi 
  fi
done