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It's gotten to the point where careful investigation is needed just to tell parody from reality. I think that means reality is broken.- Noclevername.

That's a graphics demo supplied with ATI graphics cards a few years ago - made from some stuff by a team called Animusic. I thought it was very cool when I first saw it a while ago.

http://youtube.com/watch?v=_sekfOe6XoU is a human analogue in some respects.

The tolerances required would have to be extremely tight to keep balls from going all over the place. One source of uncertainty would be the balls bouncing off those extremely narrow cylinders/cables. A few mm either way, and the direction of the ricochet changes quite a bit.

Either that or it would have to have a long "tune up" period where you keep tweaking while balls go everywhere until it starts getting them in the holes.

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That would be amazing, but the skeptic in me tells me that he's not really playing it.
Check out the two notes at 1:34 to see if you see what I think I see. They are the same note, but the balls appear to be at least a few notes apart.

Somehow this thread reminds me of goldfish and ping pong balls.

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PBS stations have been running those vids for years.

Actually jugglers have been doing "music bounce juggling" for decades (I saw the Flying Karamozov Brothers do it in their act nearly 30 years ago...)

I recall reading somewhere that if you wanted to play a game of eight ball and knock all 15 balls in pockets with a single shot from the cueball, you would have to take into consideration the orbits of planets about stars in the Andromeda Galaxy to get the computations accurate enough. Now, I figure the Animusic doesn't require quite that high a tolerance, but I suspect that tolerance is still higher than what current technology could deliver.

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Todd (Bowie, MD, US, North America, Earth, Sol System, Vega region, Local Bubble, Orion arm, Milky Way Galaxy, Local Group, Virgo A Cluster, Virgo supercluster, the universe in which spock is clean shaven)

Quidquid latine dictum sit, altum sonatur.

personal page: http://blog.astrosketches.info

Ooh---the suspense...

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Utter nonsense. People walking around the bar gravitationally affect the balls orders and orders and orders of magnitude more than planets in another galaxy.

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Well yes, but I think the point is, as well as the people around the bar, and all the people on Earth, and the leaves on all the trees, and all the grains of sand, and every molecule of air, and all the other planets, and all the other stars, you would also have to take into consideration the motions of planets in the Andromeda galaxy.

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Wikipedia: A MMORPG for self-denialists.

It's gotten to the point where careful investigation is needed just to tell parody from reality. I think that means reality is broken.- Noclevername.

I doubt that you would though. That sounds like a far smaller effect than you would have to compensate for.

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No idea if it's still there, but when I was a kid there was a giant billiard-ball contraption in the Toronto Science Centre that was something like this. It didn't play music but it bounced balls off drums, into funnels, down ramps, etc. to a very high degree of precision. It was pretty neat.

- J

Yamaha's TENORI-ON is:

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The Museum of Science and Industry in Chicago has a cause and effect machine that runs automatically each day and while the moves don't quite rival the musical image shown, the complexity is very close. By displacing weights and fulcrums and hitting electronic switches enough one can get the idea that such an instument is not that far off the wall. Adding the computer age technology to such a system with an equally involved designer having spare time should make it realized. I am sure there are many replicas of the real one I am speaking of all over the world. But why bother? I get more intrigued with the one in Chicago.

The "Butterfly Effect" would quickly render much of that into a blur which you could effectively lump into a single element. So, you wouldn't have to know what the orbits of the planets in the Andromeda galaxy were, only that there was a potential effect that could be lumped into a single calculation, and largely ignore.

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With complex systems, sometimes it is better not to concern yourself with the inner workings of the system, and just tune it around a point of stability. You have various things you adjust, you adjust each of them in turn, derive the transfer functions for various outcomes and their variances, then solve for the outcomes and variances that you are looking for. :-P

But yeah, the andromeda galaxy basically doesn't exist gravitationally for any normal situation I can imagine. The roughness of the felt in the pool table would be a few (tens, hundreds?) orders of magnitude greater effect than that.

Someone I know was trying to solve an orbital stability problem about some object, and the conventional wisdom was that he would have to account for every object larger than an asteroid in the whole solar system, including mass distribution eccentricities and oblatenesses. This made the model hopelessly complex (and vulnerable to the problems of numerical simulation). He did some calculations on each of these objects in turn and found the effects to be absurdly small compared to the two or three main bodies he was looking at, so small as to make no difference for billions of years - and so he discarded them.

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Youtube videos tend to have slight syncing problems between sound and video, so it's hard to prove/disprove this type of thing using them.

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Those "YouTube" clips are just a small part of the DVD Animusic II.

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