What's the best module to serve mp3 or audio files securely? Problem with jPlayer, etc I'm trying to protect (in this example) audio files from being downloaded.  I'm currently using jPlayer because it is supposed to provide download protection (which it supposedly does, but it breaks when I enable it).
Surely there is a way to prevent leeching and downloading of files.
The Drupal private file system, as I understand it, only restricts access per user role.  Creating a path system/files/file.mp3.  Which tells Drupal to check if the user has permission to download the file.
So if I set that up - with the file storage outside my public root - when i type     http://site.com/system/files/file.mp3, Drupal just serves up the file and it starts downloading.
Its a public file system by default, the audio file is a private file field.
If I turn on protection in the jPlayer module then it wont play.  

In the reports, immediately when viewing the node that the audio is on I get 
that the file cannot be accessed - twice in a row. Clicking on play gets me this:


  PDOException: SQLSTATE[23000]: Integrity constraint violation: 1062
  Duplicate entry '1-30-1318255859' for key 'PRIMARY': INSERT INTO
  {jplayer_denied} (uid, fid, hostname, timestamp) VALUES
  (:db_insert_placeholder_0, :db_insert_placeholder_1,
  :db_insert_placeholder_2, :db_insert_placeholder_3); Array (
  [:db_insert_placeholder_0] => 1 [:db_insert_placeholder_1] => 30
  [:db_insert_placeholder_2] => {my ip address here} [:db_insert_placeholder_3]
  => 1318255859 ) in drupal_write_record() (line 6868 of /var/www/html/drupal/includes/common.inc).


Can anyone steer me in the right direction here?

EDIT:

Well I finally got the private serving working actually - kind of.  It will serve up the file once when the page is first loaded and will only serve it again if I almost immediately try and hit the URL again.  Then after a couple seconds it will block it like it's supposed to.  This works good enough for now I suppose.
For a real good private file protection use the Private Files module.