title: Can I download an audio file and use it for push notification sound in iOS?
body: <p>I want to download a file and store it somewhere in my app, for example <code>NSUserDefaults</code>, and then play it with a push notification.</p>
  
  <p>Is it possible? If so, where is the best place to store this audio file?</p>
  
  <p>Any help is appreciated, thanks in advance</p>