title: AudioUnit: How to get rid of popping/clicking at the start and end of tones?
body: <p>Working on a game where I'm using AudioUnits to generate sound effects. I've based my sound generation code off of the sample here: <a href="http://cocoawithlove.com/2010/10/ios-tone-generator-introduction-to.html" rel="noreferrer">http://cocoawithlove.com/2010/10/ios-tone-generator-introduction-to.html</a></p>
  
  <p>I've gotten almost everything working, except I get a really annoying popping noise as each tone is starting and ending. Is there any way to filter this out? I've been working for hours to try and fix it and I could really use some pointers. What could cause this popping noise?</p>