Beam me up, Scotty!

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Copyright Notice

Whether stated or not, all Powerpoint decks here are copyright by their author, unless otherwise noted, all rights reserved. Permission is granted for your own personal (educational) use. Beyond that, you must contact the author.

Gary Gesellchen - Vanatoo

From the May 2012 meeting, Transparent One and Audio Entrepeneurship Downoload (885kB pptx)

Scott Mehrens

From the June 2011 meeting, "Inside a Cellular Telephone." Download (3.7Mb ppt)

Greg Mauser

From the March 2010 meeting, "Evolution of Analog Guitar Effects."
n.b. The clips do not play. It's a Powerpoint thing.
Click here (4+Mb ppsx file)

JJ Johnston

Note: All of JJ's Powerpoint decks are copyright by JJ Johnston. All rights reserved. Permission granted for your own personal (educational) use. This copyright applies whether stated within the deck or not.

Heyser Lecture delivered at 133rd Convention, October 2012

Heyser Lecture @ 133rd (1.18Mb pptx)

Using FFT and Octave for evaluating signals and sound systems

What the @#$%$% is FFT all about? JJ led an all day exploration in the use of the Fast Fourier Transform (FFT) in the evaluation of audio signals and sound systems. Also discussed was the open source Mathematical Modeling program Octave. Significant time was devoted to using Octave to evaluate audio signals and as a way to analyze the performance of a sound system.
link to meeting report with links to files and other materials

Hearing & Psychoacoustics

Soundfields vs. Human Hearing
Download (900k ppt)
Hearing Tutorial (131st AES, NYC, 2011) Download (2.6Mb pptx)
Download (2.8Mb ppt)
Fundamentals of Hearing Download (1.28Mb ppt)
Some possible sources of listener fatigue. Download (128kb ppt)
What can go wrong with loudness models Download (345kb ppt)
Care and Feeding of Loudness Models Download (127kb ppt)
A spatial hearing tutorial Download (842kb ppt)
A short essay on spatial hearing for the surround live conference. Download (181kb ppt)
Loudness Tutorial.
PNW Section meeting, April 2006

no sound (165k ppt)
with sound (8.2Mb ppt)
Session TS-1: Physics of Sound and Hearing (1.3Mb ppt)
A 2-hour hearing tutorial.
Download (1.3m ppt)
What Can We Hear? Download (770k ppt)
Why do we hear what we hear? Download (2Mb ppt)

Perceptual Coders and Related Hardware

A Personal History of Perceptual Audio Coding Download (4.8Mb pptx)
What's inside a portable music player? Download (672kb ppt)
The history of audio codec research at AT&T Bell Labs and AT&T-Labs Research. Download (114kb ppt)
Perceptual Coding - A wide-ranging tutorial on perceptual audio coding (3 hours minimum) Download (4.9m ppt)
The Basic Theory of Filtering Download (779k ppt)
When to Code... WHEN NOT TO CODE Download (2Mb ppt)


Why do we hear what we hear? Download (250k ppt)
Spatial Perception of Audio vs. The Home Theatre Download (2.2Mb ppt)
JJ's vote for the 10 worst mistakes in audio engineering. Reprised from the 123rd Convention. Download (131kb ppt)
A Low-Complexity, Fast-acquiring Perceptually Tuned Room Correction Algorithm.
PNW Section meeting, January 2008

Download (409kb ppt)
The Science of Audio in 2003 (From the PNW Feb 2004 meeting, From Hear to Eternity. View online
Conversion: Issues in Hearing, Sampling, Quantization and delta-sigma converter tutorial. Download (5.3Mb ppt)
Audio vs Video - the same or different? Highlights the differences between audio and video perception. Download (575k ppt)
Home Theatre vs Cinema Audio Production: the Technical Aspects Download (373k ppt)
Beyond MP3, Soundfield analysis, perception and capture or synthesis Download (2Mb ppt)

Bill Whitlock

System Interfacing Download

Bob Gudgel

From the PNW DSP and Conversion meeting Download (195k)

Aaron Gates & Steve Turnidge

From the January PNW Section Meeting
High Quality Terminations
Download (3.8Mb)

Legal, IP, Patents and Copyright

Kevin Jablonski on IP and Copyright
Feb 2009 PNW Section Meeting.
Download (219k)

Ivan Tashev

Loudspeaker Arrays for Focusing and Diffusing Sound Download (1.78Mb)

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Last modified 03/20/2013.