title: Control AudioUnits from the command line?
body: <p>Is there any software for the make which offers command line (or other scripting) utility to modify AudioUnit parameters?</p>
  
  <p>The use case is this:</p>
  
  <ol>
  <li>Default (Built-In) input</li>
  <li>Attach better Gain Control
  AudioUnit (the default OS-X gain
  control is inadequate)</li>
  <li>Attach L-R balance control (or
  "pan")</li>
  <li>Pass-through (link) to Default
  Output a.k.a. LineIn.app</li>
  <li>Script control of AudioUnit 2).
  For a 0-100% volume control of the
  input audio. In 1/16 increments
  (6.5%) just like the main volume in
  OS-X.</li>
  <li>Script control of AudioUnit 3)
  for L-R balance (pan) control.</li>
  </ol>
  
  <p>The problem here for me is at steps 5 and 6.</p>
  
  <p>Steps 1) through to 4) can be adequately achieved graphically in AudioHijackPro. The pass-through, and audio units can be created in there. It also comes with a really good gain control dial / knob. However all those effects are set exclusively through the GUI interface.</p>
  
  <p>Desperately searching for a command-line tool (or "audiounit host") which can set the parameters values and send them to these audio units with the set parameter C api function(s).</p>
  
  <p>Do any existing tools on the Mac offer this kind of functionality?</p>