it makes no sense, you can't possibly find the pin in track 2.
think that after 1 month maybe you want to change your pin, you will, but your track 2 will remain the same.
`bishop is right with the mp3 player, but it can't apply in your case
some banks ask for your card when u lost your pin. so they make a new pin and new track2 or they only decrypt the track2 and get another pin. I think every card have more pins that can work. they just give u another possible PIN