AES Standards News Blog

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A Call for Comment on REAFFIRMATION of AES58-2008 AES standard for digital audio - Audio applications of networks - Application of IEC 61883-6 32-bit generic data, was published on 2013-07-01.

http://www.aes.org/standards/comments/cfc-reaff-aes58-2008-130701.cfm

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A Call for Comment on reaffirmation of AES-16id-2010, AES information document for transfer technologies - Stylus dimensions and selection, was published on 2013-07-01. 

http://www.aes.org/standards/comments/cfc-reaff-aes-16id-2010-130701.cfm

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AES-X219 Method of measurement for frequency and impulse response of sound systems in auditoria has been initiated and assigned to AESSC Working Group SC-04-08.

The project is scoped to specify a method of measurement for frequency and impulse response of sound systems in auditoria. The output intent is a standard. 

The audience experience of sound reproduced through loudspeakers in an auditorium can vary greatly. In many applications where sound is reproduced in auditoria, a predictable performance is valued. While a number of different electro-acoustic and acoustic parameters contribute to this experience, a standard method of measuring the frequency & impulse response of the sound as presented to the audience by the loudspeaker system(s) will be a necessary part of any more general solution.

http://www.aes.org/standards/meetings/init-projects/aes-x219-init.cfm

http://www.aes.org/standards/development/membership.cfm

AES-X218 Measurement and calibration of sound systems in rooms has been initiated and assigned to AESSC Working Group SC-04-08

New project AES-X216 Calibration Pink-Noise Standard Initiated and assigned to AESSC Working Group SC-04-08

This project will liaise with SMPTE TC-25CSS in their project to "Create a pink-noise Standard, and a reference pink-noise file available in a digital audio file and DCP formats that conform to the description of the pink noise in ST 202:2010 and RP 200-2012 and for which the time domain (mean, standard deviation, skew, kurtosis, etc) and frequency domain (energy per bandwidth, bandwidth, etc) characteristics are defined. Specify the algorithm used to generate the pink-noise file." The project will consider comments as appropriate for communication to SMPTE.

Pink noise generators on the market have measurable differences that can create calibration differences between cinemas. The creation of a stand-alone pink-noise Standard and reference file (with known statistics and characteristics) will eliminate an important variable in the calibration process.

http://www.aes.org/standards/meetings/init-projects/aes-x216-init.cfm

http://www.aes.org/standards/development/membership.cfm

New project AES-X215 Current procedures to calibrate the cinema B-Chain has been initiated and assigned to AESSC Working Group SC-04-08.

This project will liaise with SMPTE TC-25CSS in their project to Codify current procedures as used by skilled theater technicians to calibrate the Cinema B-Chain. The project will consider comments as appropriate for communication to SMPTE.

Current standards for B-chain calibration include ST202 and ISO 2969 which have been used since the mid 1970s, however the effectiveness of this calibration still varies widely. Measurement equipment and technology has evolved since these standards were made. No standardized procedure exists for using modern technology (such as dual DFT-based transfer-function technology) to calibrate cinema theater B-chain systems.

http://www.aes.org/standards/meetings/init-projects/aes-x215-init.cfm

http://www.aes.org/standards/development/membership.cfm

AES66-2012, AES standard for professional audio equipment - Application of connectors - Miniature XLR-type polarity and gender, has been published.

This standard is intended to apply to three- and five-pin circular connectors, commonly and generically known as miniature XLR-type, used for the balanced interconnection of all categories of sound system components for professional audio, commercial, recording, broadcast, and similar applications, regardless of function, type, or level of the signal. It specifies the application and polarity of analog signals for these connectors and is intended to avoid the inversion of absolute polarity among the items in the analog signal chain.

http://www.aes.org/publications/standards/search.cfm?docID=95

AES65-2012, AES standard for interconnections - Connector for surround microphones, has been published.

An increasing number of surround sound microphones are becoming available, however, there has been no common standard for the connectors between microphone and recording device. It is expected that a standard connection will create a basis for smaller and lighter recording devices. 

This standard specifies a connector type and contact assignment for microphones having up to six balanced analog output channels, as used in surround sound applications. It includes specifications for marking and identification for the audio channels. It includes recommendations for cable type and detailed wiring. It is expected that other applications will also use this connection. 

http://www.aes.org/publications/standards/search.cfm?docID=94

 AES2-2012, AES standard for acoustics - Methods of measuring and specifying the performance of loudspeakers for professional applications - Drive units, has been published.