Shell to Convert m4a to mp3

After having read some hilariously terrible attempts at shell scripts to convert m4a to mp3 I couldn't help but write something concise..

#!/bin/bash

for file in *.m4a; do
    mplayer -ao pcm "$file" -ao pcm:file="${file/m4a/wav}";
    lame --alt-preset 160 "${file/m4a/wav}" "${file/m4a/mp3}";
done

rm *.wav

Doesn't require multiple shell scripts or extensive string replacement with sed :s

Only requires mplayer and lame. You can used faad instead of mplayer but I didn't have that installed. Simple.