AES Standards News Blog

AES-R10-2008, AES standards project report - Use cases for networks in professional audio, has been published 2008-08-25. Use cases for some advanced audio applications using the IEEE 1394 Higher Performance Serial Bus were explored by joint task groups set up by AES Standards Working Group SC-02-12 and the 1394TA Pro Audio Working Group. The work was subdivided into three application areas; Recording, Live Sound, and Installations. This report summarises the output of these three groups.

http://www.aes.org/publications/standards/search.cfm?docID=64

A Call for Comment on DRAFT AES58-xxxx, AES standard for digital audio - Audio applications of networks - Application of IEC 61883-6 32-bit generic data, has been published.

http://www.aes.org/standards/b_comments/cfc-draft-aes58-xxxx.cfm

AES31-3-2008, AES standard for network and file transfer of audio - Audio-file transfer and exchange - Part 3: Simple project interchange, has been published 2008-05-08. This standard provides a convention for expressing audio edit data in text form in a manner that enables simple and accurate computer parsing while retaining human readability. Edit precision is sample-accurate while a presentation method (TCF) retains the readability of conventional frame-based time codes. This revision incorporates previous corrigenda, and includes a number of editorial updates and corrections based on experiences of practical implementation. It has also been extended to include support for higher sampling frequencies and simple gain and surround pan automation.

http://www.aes.org/publications/standards/search.cfm?docID=32

AES3-am5-2008, Amendment 5 to AES standard for digital audio - Digital input-output interfacing - Serial transmission format for two channel linearly represented digital audio data, has been published 2008-04-19. Recent projects to support carriage of MPEG Surround data in an AES3 bitstream (see AES55-2007), as well as questions arising when considering non-PCM data in an AES3 signal, require some detailed changes to the AES3 specification. This amendment adds a flag to indicate hidden data within a PCM signal, provides indications for two additional sampling frequencies, and clarifies the use of certain status bits when the signal is non-PCM.

http://www.aes.org/publications/standards/search.cfm?docID=62

AES55-2007, AES standard for digital audio engineering - Carriage of MPEG Surround in an AES3 bitstream, has been published 2008-03-18. MPEG Surround is an ISO/IEC standard to extend mono or stereo audio towards multiple channels. The mono or stereo audio channels represent a downmix of the original multi-channel audio that is generated by the MPEG Surround encoder. In addition the MPEG Surround encoder generates spatial side information (MPEG Surround data). An MPEG Surround decoder is able to combine this information with the downmix to result in a multichannel audio signal. In this way backward compatibility to mono and stereo systems is achieved. This standard specifies how MPEG Surround shall be carried within an AES3 bitstream where the downmix channels remain in the linear PCM domain and the MPEG Surround data is encoded into the least-significant bits of the PCM audio data.

http://www.aes.org/publications/standards/search.cfm?docID=60

AES-R9-2008, AES standards project report - Considerations for standardising AES metadata sets, has been published 2008-03-12. This report discusses primary issues and outlines some elementary considerations relevant to the standardisation of sets of audio metadata.

http://www.aes.org/publications/standards/search.cfm?docID=58

The Call for Comment on reaffirmation of AES20-1996 (r2002), AES recommended practice for professional audio - Subjective evaluation of loudspeakers, published 2007-11-15, closed without comment. AES20-1996 (r2007) is reaffirmed.

http://www.aes.org/publications/standards/search.cfm?docID=24

A Call for Comment on DRAFT REVISED AES31-3-xxxx, AES standard for network and file transfer of audio - Audio-file transfer and exchange - Part 3: Simple project interchange, was published 2008-02-07.

http://www.aes.org/standards/b_comments/cfc-draft-rev-aes31-3-xxxx.cfm

The Call for Comment on reaffirmation of AES27-1996 (r2002), AES recommended practice for forensic purposes - Managing recorded audio materials intended for examination, published 2007-10-31, has closed without comment. AES27-1996 (r2007) is reaffirmed.

http://www.aes.org/publications/standards/search.cfm?docID=29

A Call for Comment on DRAFT AES3-Am5-xxxx, Amendment 5 to AES standard for digital audio - Digital input-output interfacing - Serial transmission format for two channel linearly represented digital audio data, was published 2008-01-18.

http://www.aes.org/standards/b_comments/cfc-draft-aes3a5-xxxx.cfm