[sdiy] ye olde sawtooth

[Matti]

What immediatel springs to mind is......the ear's inherent non-linearity.
As the air particles push in on the ear, they've got those bones on the
inside to contend with, so the very peaks on the negative end of a
waveform will be rounded, less peaked, and won't deviate as far from zero
as the positive peaks will, be the time it reaches the brain.


Grains of salt to be supplied by your local starbucks.

Enjoy

--------------------------------------------
I wanna see it painted, painted black
Black as night, black as coal
I wanna see the sun blotted out from the sky
I wanna see it painted, painted, painted black

On Sun, 18 Mar 2001, [iso-8859-1] Sebastian Kuehnl wrote:

> Can someone give hints on why a "falling" sawtooth is perceived brighter in
> pitch and timbre than a "rising" (ramp) sawtooth? First one might think it's
> the 90° attack click, but what has positive or negative amplitude/ distribution
> of AC to do with my hearing sense? Yes it sounds the same under my headphones
> when inverting or reversing the waves; of course the impression can change
> (swap) through phase differences due to room positioning; I haven't tried what
> it's like when standing on my head, though... I suspect I'm simply ignorant of
> a fundamental physycal law here.
>
> Try it with a ringmodulator whose inputs are a sinewave and a square detuned <
> a semitone from each other; the output being a morph from rectified (DC) sine
> to saw then phase inverting the same. I recall a study on ramp/ saw perception
> mentioned somewhere but can't find it. Thanks for input and hopefully this
> message arrives this year.
>
> Sebastian Kuehnl
>
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