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diff --git a/usb/common/audio/AUDHeaderDescriptor.h b/usb/common/audio/AUDHeaderDescriptor.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
+///
+/// Class for manipulating USB %audio header descriptors.
+///
+/// !!!Usage
+///
+/// - For a USB %device:
+///     -# Declare a AUDHeaderDescriptor as part of the configuration
+///        descriptors of the %device.
+//------------------------------------------------------------------------------
+
+#ifndef AUDHEADERDESCRIPTOR_H
+#define AUDHEADERDESCRIPTOR_H
+
+//------------------------------------------------------------------------------
+//         Definitions
+//------------------------------------------------------------------------------
+
+//------------------------------------------------------------------------------
+/// \page "USB Audio class releases"
+/// This page lists the existing versions of the Audio class specification.
+///
+/// 
+/// !Versions
+/// - AUDHeaderDescriptor_AUD1_00
+
+/// Indentifies the USB audio specification release 1.00.
+#define AUDHeaderDescriptor_AUD1_00                 0x0100
+//------------------------------------------------------------------------------
+
+//------------------------------------------------------------------------------
+//         Types
+//------------------------------------------------------------------------------
+
+#ifdef __ICCARM__          // IAR
+#pragma pack(1)            // IAR
+#define __attribute__(...) // IAR
+#endif                     // IAR
+
+//------------------------------------------------------------------------------
+/// Groups the various audio interfaces to display one single function to
+/// the USB host. Subclass this structure to add a particular number of
+/// slave interface descriptors.
+//------------------------------------------------------------------------------
+typedef struct {
+
+    /// Size of descriptor in bytes.
+    unsigned char bLength;
+    /// Descriptor type (AUDGenericDescriptor_INTERFACE).
+    unsigned char bDescriptorType;
+    /// Descriptor subtype (AUDGenericDescriptor_HEADER).
+    unsigned char bDescriptorSubType;
+    /// Audio class release number in BCD format
+    /// \sa "USB Audio class releases"
+    unsigned short bcdADC;
+    /// Length of all descriptors used to qualify the Audio Control interface.
+    unsigned short wTotalLength;
+    /// Number of Streaming interfaces contained in this collection.
+    unsigned char bInCollection;
+
+} __attribute__ ((packed)) AUDHeaderDescriptor; // GCC
+
+#ifdef __ICCARM__          // IAR
+#pragma pack()             // IAR
+#endif                     // IAR
+
+#endif //#ifndef AUDHEADERDESCRIPTOR_H
+