Converting mp4 to mp3 in linux

hi folks welcome once again to this blog. Well today my semester exams got over and i was freaking out when suddenly i required to change a .mp4 file i had downloaded to a .mp3 format . This can be very easily done in linux as follows:

1. you must have faad and lame files installed in your system .
2. to convert foo.mp4 to foo.wav write as faad foo.mp4
3. next, to convert the .wav file to .mp3 , write as lame foo.wav foo.mp3

and yupiee you are done with
hope this was useful
enjoy linux :)