title: From my iOS app, How is it possible to set ringtone(default phone), alarm (default alarm), default notification, contact..?
body: <p>My app contains sound/audio files.
  <strong>Are following is possible? if yes, how ?</strong> please give some sample code.</p>
  
  <p>(1) set ringtone(default phone) ?</p>
  
  <p>(2) alarm (default alarm) ?</p>
  
  <p>(3) default notification ?</p>
  
  <p>(4) contact tone ?</p>
  
  <p><strong>SET these things from my app (audio files in my project)</strong></p>
  
  <p>Thanks in advance.</p>