BLUETOOTH® DOC
Date / Year-Month-Day
Approved
Revision
Document No
2015-07-14
Adopted
v1.3.1
A2DP_SPEC
Prepared
e-mail address
N.B.
Audio Video WG
avv-main@bluetooth.org
Bluetooth SIG Proprietary
ADVANCED AUDIO DISTRIBUTION PROFILE
SPECIFICATION
Abstract
This profile defines the requirements for Bluetooth® devices
necessary for support of the high quality audio distribution. The
requirements are expressed in terms of end-user services, and by
defining the features and procedures that are required for
interoperability between Bluetooth devices in the Audio Distribution
usage model.
BLUETOOTH SPECIFICATION Page 2 of 75
Advanced Audio Distribution Profile (A2DP)
Bluetooth SIG Proprietary
Revision History
Revision
Date
Comments
v1.3.1
14 July 2015
Adopted by the Bluetooth SIG BoD
Contributors
Name
Company
Rüdiger Mosig
Berner and Mattner
Alicia Courtney
Broadcom
Ash Kapur
Broadcom
Jiny Bradshaw
CSR
Allan Madsen
CSR
David Trainor
CSR
Akira Miyajima
Denso
Morgan Lindqvist
Ericsson
Fisseha Mekuria
Ericsson
Wim Koster
Ericsson
Rene Kuiken
Ericsson
Yuan Quinton
Marvell
Tsuyoshi Okada
Matsushita Electric Industrial
Thomas Karlsson
Mecel
Kalervo Kontola
Nokia
Vesa Lunden
Nokia
Janne Hamalainen
Nokia
Jurgen Schnitzler
Nokia
Thierry Wœlfflé
Parrot
Shaun Barrett
Philips
Christian Bouffioux
Philips
Frans de Bont
Philips
Rob J. Davies
Philips
Emmanuel Mellery
Philips
Marc Vauclair
Philips
Scott Walsh
Plantronics
Brian Gix
Qualcomm
John Larkin
Qualcomm
Atsushi Ichise
Sony
Harumi Kawamura
Sony
Hiroyasu Noguchi
Sony
Kenzo Akagiri
Sony
Masahiko Seki
Sony
Masayuki Nishiguchi
Sony
Masakazu Hattori
Sony
Rüdiger Mosig
Sony
Tomoko Tanaka
Sony
Wilhelm Hagg
Sony
Yoshiyuki Nezu
Sony
Siân James
Symbian
Junko Ami
Toshiba
Takeshi Saito
Toshiba
Yoshiaki Takabatake
Toshiba
BLUETOOTH SPECIFICATION Page 3 of 75
Advanced Audio Distribution Profile (A2DP)
Bluetooth SIG Proprietary
Name
Company
Yoichi Takebayashi
Toshiba
Ichiro Tomoda
Toshiba
Junichi Yoshizawa
Toshiba
BLUETOOTH SPECIFICATION Page 4 of 75
Advanced Audio Distribution Profile (A2DP)
Bluetooth SIG Proprietary
DISCLAIMER AND COPYRIGHT NOTICE
This disclaimer applies to all draft specifications and final specifications adopted by the Bluetooth SIG Board of Directors (both of
which are hereinafter referred to herein as a Bluetooth “Specification”). Your use of this Specification in any way is subject to your
compliance with all conditions of such use, and your acceptance of all disclaimers and limitations as to such use, contained in this
Specification. Any user of this Specification is advised to seek appropriate legal, engineering or other professional advice regarding
the use, interpretation or effect of this Specification on any matters discussed in this Specification.
Use of Bluetooth Specifications and any related intellectual property is governed by the Promoters Membership Agreement among
the Promoter Members and Bluetooth SIG (the “Promoters Agreement”), certain membership agreements between Bluetooth SIG and
its Adopter and Associate Members, including, but not limited to, the Membership Application, the Bluetooth Patent/Copyright License
Agreement and the Bluetooth Trademark License Agreement (collectively, the “Membership Agreements”) and the Bluetooth
Specification Early Adopters Agreements (1.2 Early Adopters Agreements) among Early Adopter members of the unincorporated
Bluetooth SIG and the Promoter Members (the “Early Adopters Agreement”). Certain rights and obligations of the Promoter Members
under the Early Adopters Agreements have been assigned to Bluetooth SIG by the Promoter Members.
Use of the Specification by anyone who is not a member of Bluetooth SIG or a party to an Early Adopters Agreement (each such
person or party, a “Member”) is prohibited. The use of any portion of a Bluetooth Specification may involve the use of intellectual
property rights ("IPR"), including pending or issued patents, or copyrights or other rights. Bluetooth SIG has made no search or
investigation for such rights and disclaims any undertaking or duty to do so. The legal rights and obligations of each Member are
governed by the applicable Membership Agreements, Early Adopters Agreement or Promoters Agreement. No license, express or
implied, by estoppel or otherwise, to any intellectual property rights are granted herein.
Any use of the Specification not in compliance with the terms of the applicable Membership Agreements, Early Adopters Agreement
or Promoters Agreement is prohibited and any such prohibited use may result in (i) termination of the applicable Membership
Agreements or Early Adopters Agreement and (ii) liability claims by Bluetooth SIG or any of its Members for patent, copyright and/or
trademark infringement claims permitted by the applicable agreement or by applicable law.
THE SPECIFICATION IS PROVIDED “AS IS” WITH NO WARRANTIES WHATSOEVER, INCLUDING ANY WARRANTY OF
MERCHANTABILITY, NONINFRINGEMENT, FITNESS FOR ANY PARTICULAR PURPOSE, SATISFACTORY QUALITY, OR
REASONABLE SKILL OR CARE, OR ANY WARRANTY ARISING OUT OF ANY COURSE OF DEALING, USAGE, TRADE
PRACTICE, PROPOSAL, SPECIFICATION OR SAMPLE.
Each Member hereby acknowledges that products equipped with the Bluetooth wireless technology ("Bluetooth Products") may be
subject to various regulatory controls under the laws and regulations applicable to products using wireless non licensed spectrum of
various governments worldwide. Such laws and regulatory controls may govern, among other things, the combination, operation, use,
implementation and distribution of Bluetooth Products. Examples of such laws and regulatory controls include, but are not limited to,
airline regulatory controls, telecommunications regulations, technology transfer controls and health and safety regulations. Each
Member is solely responsible for the compliance by their Bluetooth Products with any such laws and regulations and for obtaining any
and all required authorizations, permits, or licenses for their Bluetooth Products related to such regulations within the applicable
jurisdictions. Each Member acknowledges that nothing in the Specification provides any information or assistance in connection with
securing such compliance, authorizations or licenses. NOTHING IN THE SPECIFICATION CREATES ANY WARRANTIES, EITHER
EXPRESS OR IMPLIED, REGARDING SUCH LAWS OR REGULATIONS.
ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY INTELLECTUAL PROPERTY RIGHTS OR FOR
NONCOMPLIANCE WITH LAWS, RELATING TO USE OF THE SPECIFICATION IS EXPRESSLY DISCLAIMED. To the extent not
prohibited by law, in no event will Bluetooth SIG or its Members or their affiliates be liable for any damages, including without limitation,
lost revenue, profits, data or programs, or business interruption, or for special, indirect, consequential, incidental or punitive damages,
however caused and regardless of the theory of liability, arising out of or related to any furnishing, practicing, modifying, use or the
performance or implementation of the contents of this Specification, even if Bluetooth SIG or its Members or their affiliates have been
advised of the possibility of such damages. BY USE OF THE SPECIFICATION, EACH MEMBER EXPRESSLY WAIVES ANY CLAIM
AGAINST BLUETOOTH SIG AND ITS MEMBERS OR THEIR AFFILATES RELATED TO USE OF THE SPECIFICATION.
If this Specification is an intermediate draft, it is for comment only. No products should be designed based on it except solely to verify
the prototyping specification at SIG sponsored IOP events and it does not represent any commitment to release or implement any
portion of the intermediate draft, which may be withdrawn, modified, or replaced at any time in the adopted Specification.
Bluetooth SIG reserves the right to adopt any changes or alterations to the Specification it deems necessary or appropriate.
Copyright © 2001-2015. The Bluetooth word mark and logos are owned by Bluetooth SIG, Inc. All copyrights in the Bluetooth
Specifications themselves are owned by Ericsson AB, Lenovo (Singapore) Pte. Ltd., Intel Corporation, Microsoft
Corporation, Motorola Mobility, LLC, Nokia Corporation and Toshiba Corporation. Other third-party brands and names are
the property of their respective owners.
BLUETOOTH SPECIFICATION Page 5 of 75
Advanced Audio Distribution Profile (A2DP)
Bluetooth SIG Proprietary
Document Terminology
The Bluetooth SIG has adopted Section 13.1 of the IEEE Standards Style Manual,
which dictates use of the words ``shall’’, ``should’’, ``may’’, and ``can’’ in the
development of documentation, as follows:
The word shall is used to indicate mandatory requirements strictly to be followed in
order to conform to the standard and from which no deviation is permitted (shall
equals is required to).
The use of the word must is deprecated and shall not be used when stating
mandatory requirements; must is used only to describe unavoidable situations.
The use of the word will is deprecated and shall not be used when stating mandatory
requirements; will is only used in statements of fact.
The word should is used to indicate that among several possibilities one is
recommended as particularly suitable, without mentioning or excluding others; or
that a certain course of action is preferred but not necessarily required; or that (in the
negative form) a certain course of action is deprecated but not prohibited (should
equals is recommended that).
The word may is used to indicate a course of action permissible within the limits of
the standard (may equals is permitted).
The word can is used for statements of possibility and capability, whether material,
physical, or causal (can equals is able to).
