Coding of Audio Signals

A CD-ROM on audio coding artifacts with the title “Perceptual Audio Coders – What To Listen For” was prepared by the members of the AES Technical Committee on Coding of Audio Signals in 2001. This was the first educational/tutorial CD-ROM presented by the AES Technical Council on a particular topic, combining background information with specific audio examples. To facilitate the use of high-quality home playback equipment for the reproduction of the audio excerpts, the disk could also be played back on all standard audio CD players.

Inspired by the public’s huge interest in the tutorial, a second and enhanced edition of this tutorial was prepared and finalized in 2021 (“The Web Edition”). To facilitate the use on many viewing devices, the content can be played back on both computers and mobile devices, such as tablets or mobile phones. The second-generation material features a number of enhancements including new material on advanced coding strategies (partially with interactive displays) and HTML5-based seamless audio playback. Promo Video

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Free Tutorial Access

• “Perceptual Audio Codecs: What to Listen For” Tutorial Online
• “Perceptual Audio Codecs: What to Listen For” Tutorial Download

Source: Audio Labs Erlangen Resource page.

• 2025 AES International Conference on Artificial Intelligence and
  Machine Learning for Audio, London, September: Panel Discussion on “Neural Audio Coding Techniques and Their Evaluation”
• 156th AES Convention: Workshop on “Applications of AI and ML in Audio Quality Models“, together with TC-PSEAS and TC-MLAI
• 155th AES Convention: Workshop on “Can AI-Based Methods Revamp Audio Coding?”
• 154th AES Convention: Express Paper on “Introducing the Free Web Edition of the ‘Perceptual Audio Coders – What to Listen for’ Educational Material”
• 154th AES Convention: Workshop on “What Is Going On In MPEG Immersive Audio? About Virtual Worlds, Quality Evaluation & More” (jointly with TC-PSEAS)
• 153rd AES Convention/Online: Workshop “Teaching AI to hear like we do: psychoacoustics in machine learning” (jointly with TC-MLAI, slides )
• 153rd AES Convention/Online: Workshop on ‘”What Is Going On In MPEG Audio? About Virtual Worlds, Quality Evaluation & More” (jointly with TC-PSEAS)
• 150th AES Convention/Online: Workshop on ‘”Perceptual Audio Coders – What To Listen For” – Launch of The Web Edition’
• 148th AES Convention/Online: Workshop on ‘”Perceptual Audio Coders – What To Listen For” – The Web Edition’
• 147th AES Convention: Workshop on ‘MPEG-H 3D Audio Goes VR’
• 146th AES Convention: Workshop on ‘MPEG-H 3D Audio Goes VR’
• 143rd AES Convention: Workshop/PD on Modern Hybrid Audio Coding
• 142nd AES Convention: Workshop on Modern Hybrid Audio Coding
• 140th AES Convention: Workshop on 3GPP Codec for Enhanced Voice Services (EVS)
• 139th AES Convention: Workshop on Immersive Audio Coding
• 139th AES Convention: Workshop on MPEG-H 3D Audio
• 138th AES Convention: Workshop on MPEG-H 3D Audio
• 133rd AES Convention: Workshop on Error-Tolerant Audio Coding
• 131st AES Convention: Workshop on Low-delay Audio Coding for High-Quality Communications
• 131st AES Convention: Workshop on Sound Quality Evaluation
• 131st AES Convention: Tutorial ‘mp3 can sound good’
• 129th AES Convention: Workshop on Wireless Audio Streaming
• 128th AES Convention: Workshop on MPEG Unified Speech and Audio Coding (USAC)
• 127th AES Convention: Workshop on Scalable Audio Coding
• 127th AES Convention: Workshop “What Will Perceptual Audio Coding Stand for 20 Years from Now?”
• 126th AES Convention: Workshop on MPEG Spatial Audio Object Coding (SAOC)
• 125th AES Convention: Workshop on MPEG Spatial Audio Object Coding (SAOC)
• 123rd AES Convention: Workshop on MPEG Spatial Audio Object Coding (SAOC)
• 121st AES Convention: Workshop on MPEG Surround
• 121st AES Convention: Workshop on Lossless Audio Coding
• 120th AES Convention: Workshop on MPEG Surround Parametric Multi-Channel Audio Coding
• 119th AES Convention: Workshop on Next Generation Audio Communications
• 117th AES Convention: Workshop on Spatial Coding of Surround Sound
• 117th AES Convention: Workshop on Lossless Audio Coding
• 115th AES Convention: Workshop on MPEG-4 AudioBIFS
• 114th AES Convention: Workshop on MPEG-4 Audio Extensions, Workshop on “Coding of Spatial Audio”
• 113th AES Convention: Workshop on recent MPEG-4 Audio Extensions
• 113th AES Convention: Workshop on “Coding of Spatial Audio”
• 113th AES Convention: 2nd Release of CD-ROM
• 112th AES Convention: Workshop on CD-ROM, Workshop on Tandem Coding (together with AES TC on Perception)
• 111th AES Convention: Release of CD-ROM “Perceptual Audio Coders – What To Listen For”
• 110th AES Convention, Introduction & Introductory Paper on CD-ROM “Perceptual Audio Coders – What To Listen For”
• 109th AES Convention, Workshop on CD-ROM Project
• 108th AES Convention: CD-ROM Project on Coding Distortions. Listener training and education on coding distortions
• 108th AES Convention: Workshop on MPEG-4 Audio, Version 2
• 107th AES Convention: Workshop on Internet Audio
• 17th AES International Conference on High Quality Audio Coding
• 106th AES Convention: Workshop on MPEG-4 Audio
• 105th AES Convention: Workshop on Perceptual Audio Coding

These documents do not necessarily express the official position of the AES on the issues discussed at these meetings, and only represent the views of committee members participating in the discussion. Any unauthorized use of these publications is prohibited. Authorization must be obtained from the Executive Director of the AES.

2026-5-29   160_AES_TC-CAS_minutes
Description: Minutes of TC on Audio Coding at 160th AES Convention, Copenhagen, May 2026, Hybrid

2025-10-23   159_AES_TC-CAS_minutes
Description: Minutes of TC on Audio Coding at 159th AES Convention, Long Beach, October 2025, Hybrid

2025-5-16   158_AES_TC-CAS_minutes
Description: Minutes of TC on Audio Coding at 158th AES Convention, Warsaw, May 2025, Hybrid

2024-10-09   157_AES_TC-CAS_minutes
Description: Minutes of TC on Audio Coding at 157th AES Convention, New York, October 2024, Hybrid

2024-6-16   156_AES_TC-CAS_minutes
Description: Minutes of TC on Audio Coding at 156th AES Convention, Madrid, June 2024, Hybrid

2023-10-30   155_AES_TC-CAS_minutes
Description: Minutes of TC on Audio Coding at 155th AES Convention, New York, October 2023, Virtual

2023-6-20     154_AES_Convention_TC-CAS_Minutes
Description: Minutes of TC on Audio Coding at 154th AES Convention, Virtual, 05/2023

2022-12-13     153_AES_Convention_TC-CAS_Minutes
Description: Minutes of TC on Audio Coding at 153rd AES Convention, Virtual, 11/2022

2022-6-28     152_AES_Convention_TC-CAS_Minutes
Description: Minutes of TC on Audio Coding at 152nd AES Convention, Virtual Den Haag, 5/2022

2022-6-28     151_AES_Convention_TC-CAS_Minutes
Description: Minutes of TC on Audio Coding at 151st AES Convention, Virtual, 10/2021

2021-6-28     150_AES_Convention_TC-CAS_Minutes
Description: Minutes of the TC on Coding of Audio Signals, held after the 150th AES Convention, Virtual , May 2021

2020-12-1     Minutes of TC on Coding of Audio Signals from the 149th AES Convention, October 2020.
Description: Minutes of TC on Coding of Audio Signals from the 149th AES Convention, October 2020.

2020-7-31     148_AES_Convention_TC-CAS_Minutes
Description: Minutes of the TC on Coding of Audio Signals, held during the 148th AES Convention, Virtual Vienna, June 2020

2019-11-1     147th_AES_TC_CAS_Minutes_New_York
Description: Minutes of the TC on Coding of Audio Signals from the 147th AES Convention, October 16-19, 2019, New York.

2019-8-27     146_AES_Convention_TC-CAS_Minutes
Description: Minutes of the TC on Coding of Audio Signals, held at the 146th AES Convention, Dublin, March 2019

2018-11-5     Minutes of 145th AES TC on Coding of Audio Signals
Description: Minutes of 145th AES TC on Coding of Audio Signals

2018-7-12     144_AES_Convention_TC-CAS_Minutes
Description: Minutes of the TC on Coding of Audio Signals, held at the 144th AES Convention, Milano, May 2018

2023-11-2     Workshop: Can AI-Based Methods Revamp Audio Coding?
Description: Slide presentations from workshop chaired by Jan Skoglund at the AES 155th Convention, October 2023

2023-6-5     Workshop: What Is Going On At MPEG Immersive Audio
Description: Slide presentations from workshop chaired by Juergen Herre at the AES 154th Convention, May 2023

2022-11-8     Workshop: What Is Going On In MPEG Audio
Description: Slide presentations from workshop chaired by Juergen Herre at the AES 153rd Convention, October 2022

2020-6-6     “Perceptual Audio Coders – What To Listen For” – The Web Edition
Description: Slides from workshop at the AES 148th Convention, June 2020

2019-10-20     MPEG-H 3D Audio goes VR
Description: Slide presentations from workshop GA07 chaired by Juergen Herre at the AES 147th Convention, October 2019

2019-4-3     MPEG-H 3D Audio goes VR
Description: Slide presentations from workshop W6 chaired by Juergen Herre at the AES 146th Convention, March 2019

2017-5-23     Modern Hybrid Coding Workshop AES142
Description: Slides of the Workshop 19 “Modern Hybrid Audio Coding”, AES142, Berlin

2016-6-9     EVS Workshop AES140
Description: Slides of the Workshop 16 “Codec for Enhanced Voice Services (EVS) – The New 3GPP Codec for Communication”, AES140, Paris

2015-5-13     ISO/MPEG-H Audio—The New Standard for Universal Spatial / 3D Audio Coding
Description: Slide presentations from workshop W2 chaired by Juergen Herre at the AES 138th Convention, May 2015

2009-11-3     Workshop: What Will Perceptual Audio Coding Stand for 20 Years from Now?
Description: Slide presentations from workshop W5 chaired by Anibal Ferreira at the 127th AES Convention, October 2009

2009-5-10     Workshop: MPEG SAOC: Interactive Audio and Broadcasting …
Description: Slide presentations from workshop W22 chaired by Oliver Hellmuth at the 126th AES Convention, May 2009

2008-10-13     Workshop: Upcoming MPEG Standard for Efficient Parametric Coding and Rendering of Audio Objects
Description: Slide presentations from workshop W11 chaired by Oliver Hellmuth at the 125th AES Convention, October 2008

2007-10-6     Workshop: FROM SAC TO SAOC – RECENT DEVELOPMENTS IN PARAMETRIC CODING OF SPATIAL AUDIO
Description: Slide presentations from workshop W10 chaired by Juergen Herre at the AES 123rd Convention, October 2007

2006-10-29     Audio Coding Tutorial
Description: Tutorial on Perceptual Audio Coding, presented at 121st AES Convention, October 2006 (Part by Marina Bosi)

2006-10-20     Workshop: LOSSLESS AUDIO COMPRESSION — TECHNOLOGY AND FORMATS
Description: Slide presentations from workshop W14 chaired by Tilman Liebchen at the AES 121st Convention, October 2006

2006-10-16     Workshop: MPEG SURROUND — THE MPEG STANDARD FOR PARAMETRIC MULTICHANNEL AUDIO CODING
Description: Slide presentations from workshop W16 chaired by Juergen Herre at the AES 121st Convention, October 2006

2006-6-5     Workshop: MPEG SURROUND—RECENT PROGRESS IN PARAMETRIC CODING OF MULTICHANNEL AUDIO
Description: Slide presentations from workshop W9 chaired by Juergen Herre at the AES 120th Convention, May 2006