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Jul 2, 2016 at 0:52 history edited Stan CC BY-SA 3.0
Expanded the absolute value part of my answer which was confusing.
Jul 1, 2016 at 5:31 comment added junkyardsparkle To elaborate a little on that last line: There are people with "perfect pitch" to an impressive degree, but our ability to perceive absolute periodicity pretty much goes away above the frequencies of the audio spectrum. With color, it's about perceiving relative quantities of red, green, and blue... and in the audio domain our perception of fluctuation in amplitude is vastly less precise than it is with fluctuations in frequency as well.
Jun 29, 2016 at 21:34 history answered Stan CC BY-SA 3.0