A simple script to convert audiofiles from one format into another using ffmeg and minor eyecondy...

convert.sh

#!/bin/bash
# convert all files in the cwd to antoher format using ffmeg

clear;

# some eyecandy first :)
for i in {16,16,22,28,34,40,76} ; do echo -en "\e[48;5;${i}m \e[0m" ; done;
for i in {0..5} ; do echo -en "\e[48;5;76m \e[0m" ; done;

echo -en "\e[1m\e[97m\e[48;5;76mconverting audiofiles with ffmpeg\e[0m"

for i in {0..5} ; do echo -en "\e[48;5;76m \e[0m" ; done;
for i in {76,40,34,28,22,16,16} ; do echo -en "\e[48;5;${i}m \e[0m" ; done ; echo;

echo
# ask for input output formats
echo "  ==> what is the format of the files want to convert? <=="
read inputformat
echo "         ==> what is the desired outputformat? <=="
read outputformat
# loop through all files of the given format
for f in *.$inputformat;
do
  # convert the audiofile
  ffmpeg -i "$f" ${f%.*}.$outputformat;
  echo -e "\e[104m\e[1m\e[97m$f => ${f%.*}.$outputformat \e[0m";
done

# check if we have as many old files as new ones
echo "                 ==> checking files <=="
echo
# count files
COUNT1=`ls -alh *.$inputformat | wc -l`
COUNT2=`ls -alh *.$outputformat | wc -l`
if  [ "$COUNT1" -eq "$COUNT2" ] ; 
then 
  echo -e "\e[1m\e[48;5;76m;\e[97m  [x] ok   \e[0m"; 
else
  echo -e "\e[1m\e[101m\e[97m   !!! Error !!!   \e[0m";
fi
echo -e "$COUNT1 $inputformat-Dateien || $COUNT2 $outputformat-Dateien"
echo

# delete the old files
echo "   ==> do you wnat me to delete all $inputformat-files? [y|N] <=="
read answer
case $answer in
  y|Y|yes|Yes|YES)
    # use -i for safety :)
    rm *.$inputformat -i
    ;;
  n|N|No|no|*)
    echo "  ...ok :)"
    ;;
esac