AES Standards Logo
spacing
About AES Standards
AES Standards news
Drafts for comment
Published documents
Groups and projects
Participation
Members log-in
Audio Engineering Society Standards Committee spacing
spacing
October 2008 meeting of SC-02-02

Audio Engineering Society

Standards Committee

Notice and agenda for the meeting of
SC-02-02
Working Group on digital input/output interfacing
of the SC-02 Subcommittee on Digital Audio

To be held in conjunction with the upcoming AES 125th Convention in San Francisco, CA., US., 2008-10. The meeting is scheduled to take place at the Moscone Convention Center. Please check the latest schedule at http://www.aes.org/standards/

  1. Introduction to working group and attendees
  2. Amendments to and approval of agenda
  3. Approval of report of previous meeting

Held in Amsterdam, Netherlands, 2008-05.

  1. Open Projects

**One or more of these projects may be in the process of a formal Call for Comment (CFC), as indicated by the project status. In these cases only, due process requires that any comments be published.

AES-R6: Guidelines for AES50 (HRMAI)

Project scope: Guidelines for AES50, High-resolution multi-channel audio interconnection (HRMAI)
Assigned to: SC-02-02 , Status: Propose to change title for clarity to, "Guidelines for AES50 (HRMAI)" at next reprinting
Intent: Review , Initiated: 2005-07 , Target: 2010
Current goal: Status report , Goal date: continuing

AES-2id-R: Review of AES-2id-2006: AES information document for digital audio engineering - Guidelines for the use of the AES3 interface

Project scope: to present information intended to assist a user to understand and use the AES3 digital audio interface. The document covers four basic topics: general, operational, electrical, and troubleshooting.
Assigned to: SC-02-02 , Status: Changes re AES3 amendments 5&6 and AES3-X to be consolidated when AES3-X published
Intent: Review , Initiated: 2006 , Target: 2011
Current goal: Status report , Goal date: continuing

AES-10id-R: Review of AES-10id-2005: AES information document for digital audio engineering - Engineering guidelines for the multichannel audio digital interface (MADI) AES10

Project scope: to provide guidance for areas of application of the MADI standard (AES10) that might be unclear. The information presented in these guidelines is not part of the AES10 standard. It is intended to assist a user to understand and use the MADI interface. The AESSC hopes these guidelines will further the design of mutually compatible interfaces and encourage consistent operational practices.
Assigned to: SC-02-02 , Status: R Caine will determine whether recent reflector traffic requires any amendment
Intent: Review , Initiated: 2005 , Target: 2010
Current goal: Status report , Goal date: Continuing

** AES3-R: Review of AES3-2003: AES standard for digital audio engineering - Serial transmission format for two channel linearly represented digital audio data

Project scope: This document specifies a recommended interface for the serial digital transmission of two channels of periodically sampled and linearly represented digital audio data from one transmitter to one receiver.
Assigned to: SC-02-02 , Status: Call for Comment on DRAFT AES3-A6-xxxx, Amendment 6 to AES standard for digital audio - Digital input-output interfacing - Serial transmission format for two-channel linearly represented digital audio data, was published, 2008-08-11.
Intent: Revision , Initiated: 2003 , Target: 2008
Current goal: CFC , Goal date: 2008-11-12

AES3-X: Restructure of AES3-2003: AES standard for digital audio engineering - Serial transmission format for two channel linearly represented digital audio data

Project scope: This document specifies, in layered multi-part form, a recommended interface for the serial digital transmission of two channels of periodically sampled and linearly represented digital audio data from one transmitter to one receiver.
Assigned to: SC-02-02 , Status: PWD restructuring this complex document in 4 parts. Current draft 2007-09-10
Intent: Standard , Initiated: 2007 , Target: 2008
Current goal: PWD , Goal date: 2008-10

** AES5-R: Review of AES5-2003: AES recommended practice for professional digital audio - Preferred sampling frequencies for applications employing pulse-code modulation

Project scope: This standard covers the use of certain preferred sampling frequencies in applications employing pulse-code modulation where there is a need for interchange of high-fidelity digital audio programs with a minimum of transcoding complexity. This standard is not concerned with sampling frequencies for narrow-band audio applications, such as voicequality transmission links, or with processing devices in which both the input and the output signals are in an analog format, even if such signals are ultimately used for interchange of program.
Assigned to: SC-02-02 , Status: Call for Comment on DRAFT REVISED AES5-xxxx, AES recommended practice for professional digital audio - Preferred sampling frequencies for applications employing pulse-code modulation, was published 2008-08-10
Intent: Revision , Initiated: 2003 , Target: 2008
Current goal: CFC , Goal date: 2008-11-11

AES10-R: Review of AES10-2003: AES Recommended Practice for Digital Audio Engineering - Serial Multichannel Audio Digital Interface (MADI)

Project scope: This standard describes the data organization and electrical characteristics for a multichannel audio digital interface (MADI). It includes a bit-level description, features in common with the two-channel format of the AES3, AES Recommended Practice for Digital Audio Engineering - Serial Transmission Format for Linearly Represented Digital Audio Data, and the data rates required for its utilization. The specification provides for the serial digital transmission over coaxial or fibre-optic lines of 28, 56, or 64 channels of linearly represented digital data at a common sampling frequency within the range of 32 kHz to 96 kHz having a resolution of up to 24 bits per channel. Only single-point to single-point interconnections from one transmitter to one receiver are supported.
Assigned to: SC-02-02 , Status: Propose to revise to: redraft 4.1, 5.1; move tolerance from annex A note1 to 5.2; use base freq reference in 6.1
Intent: Revision , Initiated: 2003 , Target: 2008
Current goal: PWD , Goal date: 2008-10

AES11-R: Review of AES11-2003: AES Recommended Practice for Digital Audio Engineering - Synchronization of digital audio equipment in studio operations.

Project scope: This document provides a recommended practice for manufacturers and users of digital audio equipment aimed at promoting economical and efficient methods for synchronizing interconnected digital audio equipment. The provisions make use of the two-channel digital audio interface standard for professional use, AES3. It is expected that the recommendations will be adopted for synchronizing all other digital audio interfaces. The document addresses two groups of parameters. The first concerns the performance requirements for the successful interchange of digital audio data between equipment (5). The second concerns the performance requirements for the regeneration of clocks used for analog-to-digital and digital-to-analog, conversion (6).
Assigned to: SC-02-02 , Status: Propose to revise: add 24/1.001 to table 1
Intent: Revision , Initiated: 2003 , Target: 2008
Current goal: PCFC , Goal date: 2008-10

AES47-R: Review of AES47-2006: AES standard for digital audio - Digital input-output interfacing - Transmission of digital audio over asynchronous transfer mode (ATM) networks

Project scope: to set a standard practice for mapping multiple channels of audio in linear PCM or AES3 format into an ATM transport system, for the purposes of interconnecting large numbers of sources and destinations, with best performance for latency, jitter and other relevant factors.
Assigned to: SC-02-02 , Status: PWD for draft amendment posted 2008-07-23
Intent: Review , Initiated: 2006 , Target: 2011
Current goal: Corrigendum , Goal date: 2008-10

AES50-R: Review of AES50-2005, High Resolution Multichannel Audio Interconnection (HRMAI)

Project scope: To specify a bi-directional, point-to-point connection for up to 48 channels of digital audio in a variety of formats. The link uses a single Category 5 (or better) structured-wiring data cable, and is designed for use in a studio environment. The system uses the 100Base-TX physical layer of Fast Ethernet (IEEE 802.3) to transfer framed audio data. Audio synchronisation is maintained by transmitting an audio clock signal in parallel with the audio data utilising available signal pairs on the cable.
Assigned to: SC-02-02 , Status: No action requested or required
Intent: Review , Initiated: 2005-07 , Target: 2010
Current goal: Status report , Goal date: continuing

AES-X139: Liaison with EBU P/AGA

Project scope:
Assigned to: SC-02-02 , Status: Continuing
Intent: Liaison , Initiated: 2002-03 , Target: Continuing
Current goal: Status report , Goal date: Continuing

AES-X161: Digital interface for loudspeakers

Project scope: To identify the different circumstances in which digitally-interfaced loudspeakers are used, arrange them into groups with similar requirements, specify those requirements, and identify existing standards that would be appropriate. A follow-on project could then develop any new standards that are needed, based on the specified requirements.
Assigned to: SC-02-02 , Status: Work proceeding in IEC 62537
Intent: Report , Initiated: 2007-01-19 , Target: 2007-06
Current goal: Status report , Goal date: 2008-10

AES-X182: AES/Ethernet Simple Open Protocol

Project scope: to specify a means for transmission over category 5 data cable of unidirectional digital audio and bidirectional control data. Intended applications are active loudspeakers and amplifiers for live performance and for installations.
Assigned to: SC-02-02 , Status: Project initiated 2008-09-03
Intent: Standard , Initiated: 2008-09-03 , Target: 2009
Current goal: PTD , Goal date: 2008-11

  1. Liaisons
  2. New Projects
  3. New Business
  4. Date of next meeting

NOTES:
  • Please make sure you sign the attendance sheet that will be circulated. This sheet shall be passed to the secretariat after the meeting.
  • Please make sure that any documents contributed to the meeting are passed to the secretariat who will ensure they are posted to the appropriate Working Group document site.
page updated 2008-09-24

Maintenance Annex

The following projects are subject to periodic review, however no issues have been identified for discussion so far. If you wish to propose a matter for discussion regarding any of these projects, please send an e-mail message to the working group before the meeting, or inform the chair at the beginning of the meeting.

AES-R4: Review of AES-R4 2007: Guidelines for AES standard for digital audio - Digital input-output interfacing - Transmission of digital audio over asynchronous transfer mode (ATM) networks, AES47

Status: No action requested or required
Intent: Review , Initiated: 2007 , Target: 2012
Current goal: Status report , Goal date: continuing

AES-R8: AES standards project report - Synchronisation of digital audio over wide areas

Status: No action requested or required
Intent: Report , Initiated: 2007 , Target: 2012
Current goal: Status report , Goal date: continuing

AES-3id-R: Review of AES-3id-2001 (r2006): AES information document for digital audio engineering - Transmission of AES3 formatted data by unbalanced coaxial cable

Status: No action requested or required
Intent: Review , Initiated: 2006 , Target: 2011
Current goal: Status report , Goal date: continuing

AES41-R : Review of AES41-2000 (r2005): AES standard for digital audio - Recoding data set for audio bit-rate reduction

Status: No action requested or required
Intent: Review , Initiated: 2005 , Target: 2010
Current goal: Status report , Goal date: Continuing

AES51-R: Review of AES51-2006: AES standard for digital audio - Digital input-output interfacing - Transmission of ATM cells over Ethernet physical layer

Status: No action requested or required
Intent: Review , Initiated: 2006-06-16 , Target: 2011
Current goal: Status report , Goal date: Continuing

AES52-R: Review of AES52-2006, AES standard for digital audio engineering - Insertion of unique identifiers into the AES3 transport stream

Status: No action requested or required
Intent: Review , Initiated: 2006 , Target: 2011
Current goal: Status report , Goal date: Continuing

AES53-R: Review of AES53-2006, AES Standard for digital audio - Digital input-output interfacing - Sample-accurate timing in AES47

Status: No action requested or required
Intent: Review , Initiated: 2006 , Target: 2011
Current goal: Status Report , Goal date: Continuing

AES55-R: Review of AES55-2007; Carriage of PCM with MPEG Surround data over AES3

Status: No action requested or required
Intent: Review , Initiated: 2007 , Target: 2012
Current goal: Status report , Goal date: continuing
spacing

For more information about standards activity, e-mail to

AES Standards Home

(C) 2008, Audio Engineering Society, Inc.