My audio files not supported. Why?

Question

I made it public with name "Piano".

Answer 1

Yes i couldn't make code to work, so i wrote easier version😉
Thanks visph :P )

Answer 2

The name was changed to Music Player, isn't it? ^^

Your code is working, with this file:
http://media.radio-libertaire.org/backup/03/lundi/lundi_2230/lundi_2230.mp3

From two things one: you don't copy correctly the url of the file(s) you want to play ( for a local file, you must prefix 'file' instead of 'http' ), or the format/codec isn't supported by your browser ( not same supported files format on all browsers, unfortunaly -- and the problem is bigger with video formats :P )