title: Adding sound to play in 2 different view controllers, and repeating the sound
body: <p>In my project I have <code>ViewController</code> &amp;&amp; <code>GameViewController</code></p>
  
  <p>When the app launches I want to play my <code>sound.mp3</code> and I want it to play in all the views and repeat the sound as long as the app runs.</p>
  
  <p>I have watched almost every tutorial on Youtube without getting this to work, it's getting really frustrating.</p>