wp_get_attachment_url() process full file path like
http://example.com/wp-content/uploads/2014/12/aura.mp3
I want the url without http://example.com/
So, I want above example as wp-content/uploads/2014/12/aura.mp3
instead of http://example.com/wp-content/uploads/2014/12/aura.mp3
. How to do it?