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diff --git a/usb/common/audio/AUDDataEndpointDescriptor.h b/usb/common/audio/AUDDataEndpointDescriptor.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
+/// 
+/// Definition of the USB audio-specific data endpoint descriptor.
+///
+/// !!!Usage
+/// 
+/// -# Declare an AUDDataEndpointDescriptor instance as part of the
+///    configuration descriptors of a USB %audio %device.
+//------------------------------------------------------------------------------
+
+#ifndef AUDDATAENDPOINTDESCRIPTOR_H
+#define AUDDATAENDPOINTDESCRIPTOR_H
+
+//------------------------------------------------------------------------------
+//         Definitions
+//------------------------------------------------------------------------------
+
+/// Descriptor subtype for an Audio data endpoint.
+#define AUDDataEndpointDescriptor_SUBTYPE                   0x01
+
+//------------------------------------------------------------------------------
+/// \page "USB Audio Lock delay units"
+///
+/// This page lists the valid lock delay unit types.
+/// 
+/// !Units
+/// - AUDDataEndpointDescriptor_MILLISECONDS
+/// - AUDDataEndpointDescriptor_PCMSAMPLES
+
+/// Lock delay is expressed in milliseconds.
+#define AUDDataEndpointDescriptor_MILLISECONDS              1
+
+/// Lock delay is expressed in decoded PCM samples.
+#define AUDDataEndpointDescriptor_PCMSAMPLES                2
+//------------------------------------------------------------------------------
+
+//------------------------------------------------------------------------------
+//         Types
+//------------------------------------------------------------------------------
+
+#ifdef __ICCARM__          // IAR
+#pragma pack(1)            // IAR
+#define __attribute__(...) // IAR
+#endif                     // IAR
+
+//------------------------------------------------------------------------------
+/// Gives additional information about an USB endpoint used to transmit audio
+/// data to or from the host.
+//------------------------------------------------------------------------------
+typedef struct {
+
+    /// Size of descriptor in bytes.
+    unsigned char bLength;
+    /// Descriptor type (AUDGenericDescriptor_ENDPOINT).
+    unsigned char bDescriptorType;
+    ///  Descriptor subtype  (AUDDataEndpointDescriptor_SUBTYPE).
+    unsigned char bDescriptorSubType;
+    /// Indicates available controls and requirement on packet sizes.
+    unsigned char bmAttributes;
+    /// Indicates the units of the wLockDelay fields.
+    /// \sa "USB Audio Lock delay units"
+    unsigned char bLockDelayUnits;
+    /// Time it takes for the endpoint to lock its internal clock circuitry.
+    unsigned short wLockDelay;
+
+} __attribute__ ((packed)) AUDDataEndpointDescriptor; // GCC
+
+#ifdef __ICCARM__          // IAR
+#pragma pack()             // IAR
+#endif                     // IAR
+
+#endif //#ifndef AUDDATAENDPOINTDESCRIPTOR_H