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Audio DesignLine Blog

Audio Myths Workshop video

Rich Pell

2/10/2010 11:06 AM EST

Here's a video version of the Audio Myths workshop that was held at the AES show in New York City last October. This wide-ranging presentation refutes a variety of audio myths found in both the consumer and professional audio fields, and covers such topics as the human perceptual system, "placebo tweaks," proper testing methods, examples of artifact audibility, and the only four audio parameters that matter, among other things.

For convenient reference I've listed the various topics (below) along with the times they occur in the video:

(If you have problems viewing the above video, it can be viewed at YouTube here.)

Starting Time/Topic:
0:00 - Introduction by Ethan Winer
1:06 - James "JJ" Johnston on the human perceptual system (auditory) and auditory testing
5:20 - Poppy Crum on how "we are programmed to hear speech and programmed to make expectations about what sounds should be"; includes example of "Stairway to Heaven" played backwards
9:40 - Ethan Winer on human auditory memory and a review of a variety of placebo tweaks like ac power cords, LP Demagnetizer, "Brilliant Pebbles," "Quantum Clip" etc.

Part 2: Ethan Winer video presentation
16:50 - Comb filtering and how it may be one explanation for many so-called sound differences reported by audiophiles from "placebo" tweaks
19:00 - Loudspeaker distortion and variations in bass response in most listening environments are much worse than those produced by electronic gear
20:15 - Specifications and anti-science bias by those who believe they don't matter
21:35 - The four audio parameters that define everything needed to assess high-quality audio reproduction (frequency response, distortion, noise, and time-based errors)
22:48 - Euphonic distortion
23:13 - Specs provide all that's needed to assess transparency as long as complete data is presented
24:09 - Masking Effect and artifact audibility
25:20 - Proper listening test methods
28:30 - The Stacking Myth
30:45 - Proper Terminology (the uselessness of subjective terms etc.)

Part 3 - Audio Examples (Ethan Winer)
32:00 - Artifact Audibility
34:30 - Dither
41:15 - Sound Cards
45:05 - Analog vs. Digital
45:50 - Bit Reduction
47:45 - Phase Shift
53:40 - The Null Test

Comments, questions or suggestions? Email me at rich.pell@verizon.net.

Related links:
Audio myth: Vinyl better than CD?
Vinyl vs. CD myths refuse to die
Audio coding artifacts: What to listen for
Audio illusions that will fool your ear (and brain)





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