/** \file
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/** \mainpage Audio Input Device Demo
 *  
 *  Audio demonstration application. This gives a simple reference
 *  application for implementing a USB Audio Input device using the
 *  basic USB Audio drivers in all modern OSes (i.e. no special drivers
 *  required).
 *  
 *  On startup the system will automatically enumerate and function
 *  as a USB microphone. Incomming audio from the ADC channel 1 will
 *  be sampled and sent to the host computer.
 *  
 *  To use, connect a microphone to the ADC channel 2.
 *  
 *  Under Windows, if a driver request dialogue pops up, select the option
 *  to automatically install the appropriate drivers.
 *  
 *
 *  <table>
 *   <tr>
 *    <td><b>USB Mode:</b></td>
 *    <td>Device</td>
 *   </tr>
 *   <tr>
 *    <td><b>USB Class:</b></td>
 *    <td>Audio Class</td>
 *   </tr>
 *   <tr> 
 *    <td><b>USB Subclass:</b></td>
 *    <td>Standard Audio Device</td>
 *   </tr>
 *   <tr>
 *    <td><b>Relevant Standards:</b></td>
 *    <td>USBIF Audio Class Specification</td>
 *    <td>USBIF Audio Class Terminal Types Specification</td>
 *    <td>USBIF Audio Data Formats Specification</td>
 *   </tr>
 *   <tr>
 *    <td><b>Usable Speeds:</b></td>
 *    <td>Full Speed Mode</td>
 *   </tr>
 *  </table>
 */