title: Do iphone push notifications send the actual sound data to play, just a filename, or is it handled by the app?
body: <p>And, does it cache it locally?</p>
  
  <p>I ask because I am wondering if it's possible to change the sound of a push notification via SSH, replacing an app sound.</p>
  
  <p>My question is specifically about how the API for push notifications works. Does it send a .caf (aiff) binary file for the phone to play each time?</p>