title: How do I create an AUAudioUnit that implements multiple audio units?
body: <p>In Apple's docs for creating an AUAudio Unit (Here: <a href="https://developer.apple.com/documentation/audiotoolbox/auaudiounit/1387570-initwithcomponentdescription" rel="noreferrer">https://developer.apple.com/documentation/audiotoolbox/auaudiounit/1387570-initwithcomponentdescription</a>)
  they claim that </p>
  
  <blockquote>
    <p>A single audio unit subclass may implement multiple audio units—for example, an effect that can also function as a generator, or a cluster of related effects.</p>
  </blockquote>
  
  <p>There are no examples of this online that I can find.  Ideally it would be nice if your answer/solution involved using Swift and AVAudioEngine but I'd happily accept any answer that gets me moving in the right direction.</p>
  
  <p>Thanks in advance.</p>