mp3 to wav

mp3towav(){
 [[ $# -eq 0 ]] && { echo "mp3wav mp3file"; exit 1; }
 for i in "$@"
 do
  # create .wav file name
  local out="${i%/*}.wav"
  [[ -f "$i" ]] && { echo -n "Processing ${i}..."; \ 

                mpg123 -w "${out}" "$i" &>/dev/null  && echo "done." || echo "failed."; }
 done 
}