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Scroll Slow. Have Fun

scrollslowhavefun.com

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Re: Scroll Slow. Have Fun

#91

Post by HCIdivision17 »

Aardwolf wrote: post #5

This somehow manages my monitor to make a high pitched sound. It's an LCD monitor. It's the actual monitor making the sound. Switching to a different window or tab makes the sound top. Taking a screenshot of the tab, and closing the tab but viewing the screenshot, produces the sound.

I'll confirm a tone shift on an HP ZR2740w as well. It's quiet, and I have to put my ear to the back of the monitor to notice as I alt-tab the window. But it's certainly there.

(I'm trying to get a recording, but I work in a plant and it's a bit full of white-ish noise...)

Re: Scroll Slow. Have Fun

#92

Post by stygiansonic »

drivers99 wrote: post #35
Aardwolf wrote: post #5

This somehow manages my monitor to make a high pitched sound. It's an LCD monitor. It's the actual monitor making the sound. Switching to a different window or tab makes the sound top. Taking a screenshot of the tab, and closing the tab but viewing the screenshot, produces the sound.

"Some surface-mount capacitors exhibit acoustic noise when operated at frequencies in the audio range." [1] I see that this screen has alternating black and white lines. I count 43 black lines on my monitor. Assuming 60 Hz refresh rate, that is 2580 Hz in terms of the pixels being off or on, which is a perfectly audible frequency. Even with 120 Hz refresh rate, that would be 5160 which is still easily audible. Withou…

I'm getting this as well, on an older dell 2407wfp.

Zooming in (i.e. making the width greater) results in a lower-pitched sound.

Zooming out (i.e. making the width narrower) results in a higher-pitched sound.

Great catch/explanation of this anomaly.

Re: Scroll Slow. Have Fun

#94

Post by b409ba0801cd21 »

This reminded me of a toy I had as a kid: the Tomy Tutor Play Computer. The screen was a lenticular lens over a paper scroll, and pressing the space bar caused the lens to move vertically.

Here is a video made by someone selling one: https://www.youtube.com/watch?v=TAghB2-Ks5I

I bet many of the people here can guess the fate of it and many of my other toys.

Re: Scroll Slow. Have Fun

#96

Post by knutae »

Avitas wrote: post #90

This trick has an interesting artifact. When I came back to HN, I noticed that my mind made my vision appear actively "wavy." In other words, I could see some slight movement of waves on the horizontally drawn elements currently displayed -- the top orange bar that says [Y]Hacker News [...] had the appearance of fluctuating with low frequency waves.

Interesting, indeed. I didn't get that, but it is probably similar to the effect caused by videos like this: https://www.youtube.com/watch?v=tVgOLWVYytM

Re: Scroll Slow. Have Fun

#97

Post by ot »

tholman wrote: post #9

For wanting to look more into the math/art behind this, they're based on Moiré patterns - http://en.wikipedia.org/wiki/Moir%C3%A9_pattern

Moiré patterns are about superimposition of periodic patterns.

This has nothing to do with it, it's just dividing an animation into scanlines and interleaving them so that the horizontal lines act as a shutter when scrolling.

Re: Scroll Slow. Have Fun

#99

Post by joebasirico »

AlphaGeekZulu wrote: post #33

We just produced a children book with this technology in Germany: http://www.amazon.de/Ulff-Backenh%C3%B6rnchen-eine-irre-Verf... Will be released in the next 4 weeks. It was fun to make, but also quite nightmarish in the technical details. It is a hell of work (we have roughly 30 animations in the book, very small and very big ones). It requires extremely accurate measurements for the grid-foil and a sophisticated w…

My son just got one of those types of books for Christmas. In the states there is a run of them called "Scanimation" books.

http://www.amazon.com/s/url=field-keywords=scanimation

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