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diff --git a/usb/common/audio/AUDGenericRequest.h b/usb/common/audio/AUDGenericRequest.h
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+/* ----------------------------------------------------------------------------
+ *         ATMEL Microcontroller Software Support 
+ * ----------------------------------------------------------------------------
+ * Copyright (c) 2008, Atmel Corporation
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * - Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the disclaimer below.
+ *
+ * Atmel's name may not be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
+ * DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
+ * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
+ * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ * ----------------------------------------------------------------------------
+ */
+
+//------------------------------------------------------------------------------
+/// \unit
+///
+/// !!!Purpose
+///
+/// Constants for using USB %audio SETUP requests.
+///
+/// !!!Usage
+///
+/// - For a USB %device:
+///     -# After receiving an Audio request from the host, use
+///        AUDGenericRequest_GetEntity to determine the target Unit or Terminal.
+///     -# After receiving an Audio request from the host, use
+///        AUDGenericRequest_GetInterface to know which interface is referenced.
+//------------------------------------------------------------------------------
+
+#ifndef AUDGENERICREQUEST_H
+#define AUDGENERICREQUEST_H
+
+//------------------------------------------------------------------------------
+//         Headers
+//------------------------------------------------------------------------------
+
+#include <usb/common/core/USBGenericRequest.h>
+
+//------------------------------------------------------------------------------
+//         Definitions
+//------------------------------------------------------------------------------
+
+//------------------------------------------------------------------------------
+/// \page "USB Audio request codes"
+///
+/// This page lists the codes of the existing Audio requests.
+/// 
+/// !Requests
+/// - AUDGenericRequest_SETCUR
+/// - AUDGenericRequest_GETCUR
+
+/// SET_CUR request code.
+#define AUDGenericRequest_SETCUR                0x01
+
+/// GET_CUR request code.
+#define AUDGenericRequest_GETCUR                0x81
+
+/// GET_MIN request code.
+#define AUDGenericRequest_GETMIN                0x82
+
+/// GET_MAX request code.
+#define AUDGenericRequest_GETMAX                0x83
+
+/// GET_RES request code.
+#define AUDGenericRequest_GETRES                0x84
+//------------------------------------------------------------------------------
+
+//------------------------------------------------------------------------------
+//         Exported functions
+//------------------------------------------------------------------------------
+
+extern unsigned char AUDGenericRequest_GetEntity(
+    const USBGenericRequest *request);
+extern unsigned char AUDGenericRequest_GetInterface(
+    const USBGenericRequest *request);
+
+#endif //#ifndef AUDGENERICREQUEST_H
+