title: Sound engine leaking… is preloading an effect bad practice?
body: <p>In the App Delegate, I am preloading <strong>all</strong> my sound effects and background music.
  When testing with Instruments, the tool shows that I am leaking memory, the source being SimpleAudioEngine and a bunch of other classes related to playing sounds. Is <code>preloadEffect</code> and <code>preloadBackgroundMusic</code> really that bad? How can I fix my memory leaks? Thank you!</p>