title: How to handle background audio playing while iOS device is locked or on another application?
body: <p>Designing a generative music system for iOS, using OpenFrameworks, I'd need to provide a mode in which the user could listen the music produced by the application when:</p>
  
  <ul>
  <li>the device is locked</li>
  <li>the user uses another application</li>
  </ul>
  
  <p>Some applications like BLOOM, or alarm clock, works like that and propose to users a switch to enable/disable this feature.</p>
  
  <p>Any tips for that ?</p>