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The following standards and information documents are published by the Audio Engineering Society. The latest printing will include all amendments and corrections and will be available within a week of its date.

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Printing Date:
2022-02-20
Publication History:
Published 2022
Abstract:
This standard details a procedure for measuring maximum linear sound levels of a loudspeaker system or driver using a test signal called M-Noise. In order to measure maximum linear sound levels meaningfully and repeatably, a signal is required whose RMS and peak levels as functions of frequency have been shown to be representative of program material. Various existing standards define noise-based test signals which, like M-Noise, have incorporated the knowledge that typical program material has a diminishing RMS level with increasing frequency, but M-Noise uniquely also features a relatively constant peak level as a function of frequency, so that the crest factor (peak level \96 RMS level) increases with frequency, which an analysis on a large variety of music and other content has revealed is an important additional characteristic of typical program material. The specified procedure determines a loudspeaker\92s maximum linear sound levels by incrementally increasing the Playback Level of M-Noise until a stop condition is met: either an unacceptable change in the transfer function\92s magnitude or an unacceptable change in the coherence of the transfer function.
File type and size:
Downloadable PDF (702.63 KB)
Cost:
$0 AES Member   $100 Non-Member

Printing Date:
2022-02-20
Publication History:
Published 2022
Abstract:
This document specifies recommended practices for recording audio intended for use in forensic speaker recognition analyses, focusing on doing so at a temporary, non-laboratory location by possibly a non-professional in the forensic sciences. It includes recommendations for the physical preparation of the location, selection of appropriate recording hardware and audio formats, and possible methods for interviewers to elicit the desired type and amount of speech from subjects. It does not cover the methods used to analyze the resulting recordings and does not deal with details related to the handling, transmission, storage, or preservation of the collected data but does include a checklist to aid in the process.
File type and size:
Downloadable PDF (1.17 MB)
Cost:
$0 AES Member   $50 Non-Member

Printing Date:
2021-09-25
Publication History:
Published 2021
Abstract:
AES67 has made low-latency, synchronized, and uncompressed audio delivery commonplace on local area networks (LANs). As the need to provide two-way interaction between multiple sites rises, there is a desire to extend AES67 solutions into Wide Area Networks (WAN) and datacenters. This report examines the requirements and challenges when AES67 is extended beyond LAN environments. After describing the operational environments and associated constraints in detail, this report will address timing, transport and data reliability in the context of WAN and cloud. The report shows that none of the discussed environments is associated with a specific single problem, but instead, there are a number of smaller technical factors that interact and need to be addressed. While this study indicates that bit-precise transmission, synchronization and timing alignment is reasonably achievable, very low latencies, use of multicast, and 100% reliable reception remain challenging or impossible. Field experience annexes included in this report correlate well with the theoretical expectations based on this study. Robustness of AES67 is confirmed by its success on WAN production facilities and long-distance deployments. It brings generally better audio quality, latency performance and routing flexibility, compared to point-to-point transport based on lossy compression.
File type and size:
Downloadable PDF (965.06 KB)
Cost:
$0 AES Member   $50 Non-Member

Printing Date:
2019-12-16
Publication History:
Published 2019
Abstract:
This document sets forth technical recommendations for media network directories and directory-related services and mechanisms such as network discovery. It is hoped that this document will inform future industry directory and directory services standards that cover at least the following topics:
1. Registration, query, and administration protocols;
2. Security mechanisms;
3. Directory data model;
4. Query language and related semantics; and
5. Scalability strategies.
File type and size:
Downloadable PDF (396.66 KB)
Cost:
$0 AES Member   $50 Non-Member

Printing Date:
2019-12-05
Publication History:
Published 2020
Abstract:
An AES67-2018 Protocol Implementation Conformance Statement (PICS) documents the capabilities of an AES67 implementation. A PICS covers all aspects of AES67 standards compliance and runs to some 25 pages. This report describes a two page summary of the primary options and interoperability points documented in a completed PICS. Though neither precise nor complete, it is useful as a cover sheet for a published PICS and to help quickly assess interoperability capabilities between implementations.
File type and size:
Downloadable PDF (1.06 MB)
Cost:
$0 AES Member   $50 Non-Member

Printing Date:
2019-07-07
Publication History:
Published 2019
Abstract:
Acoustic performance measurements on loudspeaker drivers that are measured in different sites or with different equipment or methods are subject to variations in accuracy and repeatability. Similarly, end-of-line loudspeaker test systems often utilize small, arbitrarily shaped, driver measurement chambers that do not correlate from line to line, or from site to site. This document is motivated by the need for engineers in different locations to share accurate measurement data on specific or same type loudspeaker drivers and addresses some of the factors affecting repeatability of measurements in different locations.
File type and size:
Downloadable PDF (939.43 KB)
Cost:
$0 AES Member   $100 Non-Member

Printing Date:
2019-07-07
Publication History:
Published 2019
Abstract:
This standard documents 8P8C (RJ45) pin-outs commonly used in analog and digital professional audio applications to carry four links, including channel/link order, signal polarity and phantom power compatibility. Type numbers are assigned to these variations, allowing manufacturers to easily specify which wiring standard is used in a particular piece of equipment. Users may use these type numbers to assess compatibility of disparate equipment in a given application. This standard also documents practical application details of interest to users of this technology. Conformance with this standard will identify mutually compatible devices, enabling users to avoid problems when employing equipment from multiple manufacturers.
File type and size:
Downloadable PDF (480.79 KB)
Cost:
$0 AES Member   $50 Non-Member

Printing Date:
2018-07-21
Publication History:
Pub. 2018
Abstract:
This AES Recommended Practice (RP) describes the many issues related to online audio Loudness variations. It provides comprehensive recommendations documenting effective guidelines for managing audio Loudness of soundtracks of television and video content available to consumers by Over-The-Top (OTT) and by Online Video Distributors (OVD).
When followed, these guidelines will provide consistent Loudness, appropriate playback loudness range, reduce audio quality degradation from excessive limiting, preserve the original artistic intent, and improve the listening experience. This document does not provide specific recommendations about target playback loudness or dynamic range.
File type and size:
Downloadable PDF (581.87 KB)
Cost:
$0 AES Member   $50 Non-Member

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