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/** \file
*
* This file contains special DoxyGen information for the generation of the main page and other special
* documentation pages. It is not a project source file.
*/
/** \mainpage Audio Input Device Demo
*
* \section Sec_Compat Demo Compatibility:
*
* The following list indicates what microcontrollers are compatible with this demo.
*
* - Series 7 USB AVRs (AT90USBxxx7)
* - Series 6 USB AVRs (AT90USBxxx6)
* - Series 4 USB AVRs (ATMEGAxxU4)
*
* \section Sec_Info USB Information:
*
* The following table gives a rundown of the USB utilization of this demo.
*
* <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 1.0 Class Specification \n
* USBIF Audio 1.0 Class Terminal Types Specification \n
* USBIF Audio 1.0 Data Formats Specification</td>
* </tr>
* <tr>
* <td><b>Usable Speeds:</b></td>
* <td>Full Speed Mode</td>
* </tr>
* </table>
*
* \section Sec_Description Project Description:
*
* Audio demonstration application. This gives a simple reference
* application for implementing a USB Audio Input device using the
* basic USB Audio 1.0 drivers in all modern OSes (i.e. no special drivers
* required).
*
* On start-up the system will automatically enumerate and function as a
* USB microphone. By default, the demo will produce a square wave test tone
* when the board button is pressed. If USE_TEST_TONE is not defined in the
* project makefile, incoming audio from the ADC channel 1 will be sampled
* and sent to the host computer instead.
*
* When in microphone mode, 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.
*
* \section Sec_Options Project Options
*
* The following defines can be found in this demo, which can control the demo behaviour when defined, or changed in value.
*
* <table>
* <tr>
* <td><b>Define Name:</b></td>
* <td><b>Location:</b></td>
* <td><b>Description:</b></td>
* </tr>
* <tr>
* <td>USE_TEST_TONE</td>
* <td>Makefile LUFA_OPTS</td>
* <td>When defined, this alters the demo to produce a square wave test tone when the first board button is pressed
* instead of sampling the board microphone.</td>
* </tr>
* <tr>
* <td>MICROPHONE_BIASED_TO_HALF_RAIL</td>
* <td>Makefile LUFA_OPTS</td>
* <td>When defined, this alters the demo so that the half VCC bias of the microphone input is subtracted.</td>
* </tr>
* <tr>
* <td>AUDIO_SAMPLE_FREQUENCY</td>
* <td>Descriptors.h</td>
* <td>Gives the audio sample rate per channel for the audio stream, in Hz.</td>
* </tr>
* </table>
*/
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