SC-04-08 meeting report, online meeting, 2021-05

Report of the meeting of the SC-04-08 Working Group on Measurement and Equalization of sound systems in rooms, held online, 2021-05-17

Chair Peter Mapp has resigned as chair so Standards Manager Richard Cabot served as acting chair.

In attendance were Richard Cabot, David Murphy, Geoff Hill, Thomas Lago, David Blore, David Robb, David Prince, Joel Brito, Charlie Hughes, Steve Hutt, Anthony Kuzub, Ian Robertson, Brian Long, Brian Vesa, Scott Dorsey.

The formal notice on patent policy was read.

Minutes of previous meeting online, 2020-10-08 were reviewed with the group.

Projects assigned to this group but not mentioned here had no action requested or required - see for details.

Development projects

AES-X218: Measurement and calibration of sound systems in rooms.
The Standards Manager reviewed the state of the documents that had been submitted by Charlie Hughes and David Murphy. The formats are very different and they would benefit by being put into a common format using the AES Standards template.

Steve Hutt described the work being done in SC-04-03-A on M-noise and suggested that some of that material would be useful in assessing sound systems.

David Blore suggested that the document should include a treatment of basic measurement techniques. He also described measurements he is currently doing using voice recordings as test signals.

David Murphy expanded on the use of M-noise in system measurements.

AES-X219: Method of measurement for frequency and impulse response of sound systems in auditoria
Project remains postponed until there is some output of X218


Following up on comments David Blore made at the previous meeting, Steve Hutt mentioned that a new Technical Committee has been formed for Machine Learning and Artificial Intelligence. A list of topics for discussion has been written and some of their material is relevant to apply this technology to sound system measurement.

New Projects

No new projects were proposed.

New Business

In light of both the Chair having resigned and the Vice-Chair position being empty for several years the Standards Manager solicited the group for volunteers to assume either position.

The next meeting will be scheduled in conjunction with the AES 151st Convention, to be held either face-to-face or online in October 2021.

AES - Audio Engineering Society