Access Industry-Recognized Standards

1999-02-27

Pub. 1999 for Trial Use;\nWithdrawn 2004

This proposed standard specifies the class hierarchy for the AES-24 application protocol. AES-24 classes make up the conceptual framework from which AES-24 objects and the AES-24 application protocol and its message definitions are derived. This standard is intended to be used by developers of software and firmware whose applications, devices, or both will be used in conjunction with an AES-24 network.
AESSC wishes to provide opportunity for discussion and trial use before the document is presented as a call for comment leading to finalization of the standard. It is therefore initiating a process of public discussion via the Internet.
This document has been withdrawn but is available for reference
(52 pages)

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1999-03-02

Pub. 1995; Revised 1999; \n Withdrawn 2004

This document describes the architecture of AES-24, the name assigned to an extensible application protocol for controlling and monitoring audio devices via local area networks, and, when possible in the future, devices designed for other media.
This document has been withdrawn but remains available for reference
(43 pages)

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2009-02-16

Pub. 1997; Reaffirmed 2003; Reaffirmed 2008; Stabilized 2012.

This standard provides recommendations concerning the storage conditions, storage facilities, enclosures, and inspection for recorded polyester-base magnetic tapes in roll form. It covers analog and digital tape and includes tape made for audio, video, instrumentation, and computer use. (22 pages)

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2008-02-19

Pub. 1996; reaffirmed 2002; reaffirmed 2007; Stabilized 2008-09-22

This Standard is a set of recommendations for subjective evaluation of high-performance loudspeaker systems. It is believed that, for certain audio components including loudspeakers, subjective evaluation is a necessary adjunct to objective measurements. The strong influence of listening conditions, program material and of individual evaluators is recognized. This document seeks, therefore, to assist in avoiding testing errors rather than to attempt to establish a correct procedure. (21 pages)

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1999-03-05

Pub. 1992 \nWithdrawn: 2003

This standard test method is intended to determine the frequency of lowest resonance of a loudspeaker cone. Such information is used for engineering design and for quality control. The method has been developed to improve correlation of measurement between cone manufacturers and loudspeaker manufacturers.
Note: this standard, although withdrawn as an AES document, will continue to be maintained by ALMA International. The ANSI version is also withdrawn. It had been available as S4.30-1992
(7 pages)

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2019-08-24

Pub. 1992; Reaffirmed 1996; Reaffirmed 2002; Stabilized 2008-09-22, Revised & Stabilized 2019

This Standard describes a method of formatting the user data channels provided within the digital audio serial interface format (AES3). The transmission format is an adaptation of the packet-based high-level data link control (HDLC) communications protocol and provides for the transmission of ancillary data that may or may not be time related to the audio signal. The data rate is constant within a range of +- 12.5 percent of a sampling frequency of 48 kHz. The standard also provides a data priority and management strategy to ensure that adequate capacity is available for downstream data insertion. (45 pages)

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2020-11-21

Pub. 1991; Revised 1996; Revised 1998; reaffirmed 2004; Reaffirmed 2009, Revised 2015; Revised 2020

This standard provides methods for specifying and verifying the performance of digital audio equipment. Many tests are substantially identical to those used when testing analog equipment. However, because of the unique requirements of digital audio equipment and the effects of its imperfections, additional tests are necessary.
This edition clarifies the definition of levels, the units FS and dBFS.
(39 pages)

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2000-03-15

Pub. 1991; \nWithdrawn 2002

This Audio Engineering Society (AES) Standard specifies the electrical characteristics of a balanced-voltage circuit for the interchange of serial binary signals for the control of sound-reinforcement systems. It provides for interchange among data terminal equipment (DTE), that is, computers and microprocessors, and data circuit terminating equipment (DCE). PA-422 is a mnemonic, signifying professional audio implementation of Electronics Industries Association EIA-422-A. Device control language is provided in an annex. [Current printing includes all device control coding additions to date.]
An ANSI version available as S4.49-1991 has been withdrawn.
(22 pages)

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2014-07-29

Pub. 1992; Reaffirmed 1998; Reaffirmed 2004; Reaffirmed 2009; Reprinted 2012, Reaffirmed 2014, Stabilized 2014

This Audio Engineering Society (AES) standard specifies a common scheme for wiring the connectors used in audio systems, particularly to avoid the inversion of absolute polarity among the items in the analog signal chain.
The ANSI version is withdrawn. It had been available as S4.48-1992
(8 pages)

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2020-11-27

Pub. 1991; Rev. 1997; Rev. 2003; Rev 2009; Addendum 2010-02-19; Reaffirmed 2014; Reaffirmed 2019; Revised 2020

This standard provides a systematic approach to the synchronization of digital audio signals. Recommendations are made concerning the accuracy of sample clocks as embodied in the interface signal and the use of this format as a convenient synchronization reference where signals must be rendered co-timed for digital processing. Synchronism is defined, and limits are given which take account of relevant timing uncertainties encountered in an audio studio. Includes an informative discussion of wordclock.
In this revision, the relationship with AES5 has been clarified, with tolerances specified only in AES11 and nomenclature for multiple rates only in AES5. The subclause on video referencing (4.5) and Annex B (Word Clock) have been revised to more accurately reflect the current situation in the field. Annex D has been added.
(19 pages)

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