Convert .m4a to .mp3

m4a2mp3.sh

#!/bin/bash
#
# Dump m4a to wav (first step in conversion)

mkdir -p output

for i in *.mp3
do
    mplayer -ao pcm:file="output/${i%.mp3}.wav" "$i"
done

# Convert wav to mp3
for i in output/*.wav
do
    lame --preset fast standard "$i" "${i%.wav}.mp3"
done

rm -rf output/*.wav