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[AES Pacific NW Section - Seattle USA]
Around the Puget Sound, Seattle, Washington, U.S.A


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PNW Pro-Audio/Video Events
The place to find Pro Audio and Video events in the PNW area.
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JJ's Heyser Lecture
JJ delivered the Heyser Lecture at the 133rd AES Convention. PPT deck.
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Last modified 11/20/2014.

NOTE: anyone can attend this meeting regardless of their status as an AES member.
February Meeting Notice
More Topics in Loudness - ?Microdynamics?
Presented By
JJ Johnston - Independent Audio and Electroacoustics Consultant

Thursday, February 12, 7:30pm
Digipen, Plato Auditorium
9931 Willows Road NE, Redmond, WA 98052
Directions to Digipen

You may have noticed that the word "microdynamics" is punctuated oddly. That's because there isn't one agreed definition. In this talk, the discussion of dynamic range from the talk about a year ago will be extended, again using a simple loudness model, to examine what dynamics and microdynamics might actually mean. The script lplt_t.m is also present on this site, and can be run in 32 bit freeware "octave", or with minor modifications, in MATLAB. In the talk, we will rehash the idea of loudness, point out what dynamic range might be interpreted to be in terms of loudness, and then examine how looking at loudness as a function of time might produce something that can be regarded as "microdynamics", along the way showing the weaknesses of the histogram plot of loudness from which so many other things can be discovered. Some issues of loudness analysis length will be raised, which can lead to slower processing, but immediate improvements in the actual estimation of "microdynamics".

If desired and time permits, the actual workings of the .m file are open for discussion, and room for various modifications and improvements can be pointed out.

lplt_t.m Octave script

Steve Malott
AES PNW 2014-2015 Section Chair

n.b. The material presented at our meetings is the opinion of the presenter and not necessarily that of the Society. You are encouraged to conduct your own research and to form your own opinions before adopting the presented material as Truth.

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Last modified 11/20/2014.