title: aurioTouch sample app's audio playback/thru not working?
body: <p>According to Apple's description, the aurioTouch sample app is suppose to "get the audio input and copy it to the output", which I think means that the app will playback/thru any sound the iPhone's mike picks up through the iPhone's speakers.</p>
  
  <p>When I loaded the app onto my iPhone (updated to 2.2), however, the playthru feature does not seem to work at all.  The on-screen oscilliscope reponds as expected to voices and sounds, so the audio input half of the app is clearly working.</p>
  
  <p>Yes, I have tried toggling the app's "MUTE" button, and yes, I made sure the iPhone's "ringer/silent" switch is not set to silent, and that the volume is not set to zero.
  What am I missing?</p>