title: Record audio from non-default audio device in objective C
body: <p>We know there is no API for recording live streaming audio of OS X ( output sound). And we should install a kernel extension like SoundFlower and then record audio of output channel through that kernel extension.</p>
  
  <p>I'm aware that some open source apps like audacity use Port Audio library to capture audio of another audio devices other than default audio device of system. But I couldn't compile Port Audio because of too much errors when building it on Xcode.</p>
  
  <p>I want to know there is a straight forward Core Audio API which has capability of choosing record device? AudioQueue API has no ability to determine type of record device.
  How to record output sound which is being played through SoundFLower in objective C with use of some specific Mac provided API?</p>
  
  <p>Thanks in advance for your responses.</p>