title: How to play an audio file on the web but without downloading it enabled?
body: <p>In my web (Rails) app, I would like to offer the ability to play music files for which I have received special permission from their publishers to make available for listening, but only from the web site. Is there a way I can support playing a music file such that downloading that file would not be possible?</p>
  <p>The browsers' HTML 5 audio players let you download the file that's playing, so I'm looking for a different approach.</p>
  <p>I realize that users could circumvent any restriction by redirecting their system audio to a file, or otherwise recording it, but I still want to prevent downloading the files.</p>