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#2006469 - 12/30/12 10:15 AM 32 discordant metronomes (interesting)
Pianolism Offline
Full Member

Registered: 08/27/10
Posts: 54

http://www.youtube.com/watch?feature=player_embedded&v=JWToUATLGzs#!

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#2006539 - 12/30/12 01:03 PM Re: 32 discordant metronomes (interesting) [Re: Pianolism]
DanS Offline
500 Post Club Member

Registered: 10/28/12
Posts: 666
http://www.youtube.com/watch?feature=player_embedded&v=JWToUATLGzs#!



Neat! Obviously the moving floor is the key, but still really cool.
_________________________
"In opera, there is always too much singing" -Debussy

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#2006569 - 12/30/12 02:07 PM Re: 32 discordant metronomes (interesting) [Re: DanS]
pianoloverus Online   content
Yikes! 10000 Post Club Member

Registered: 05/29/01
Posts: 20965
Loc: New York City
Originally Posted By: DanS
http://www.youtube.com/watch?feature=player_embedded&v=JWToUATLGzs#!



Neat! Obviously the moving floor is the key, but still really cool.
Can you explain more about the moving floor for those of us who are not scientifically inclined?

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#2006592 - 12/30/12 02:55 PM Re: 32 discordant metronomes (interesting) [Re: Pianolism]
Minnesota Marty Offline

Platinum Supporter until October 5 2014


Registered: 05/15/12
Posts: 7439
Loc: Rochester MN
The floor is on a gimbal which creates a slight rocking to the movement of the base. The weights on the metronomes will affect the center of gravity of the platform, and its travel arc speed, and ultimately come into synchronis movement. This would not happen on a fixed, level surface.
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Marty in Minnesota

It's much easier to bash a Steinway than it is to play one.

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#2006742 - 12/30/12 08:41 PM Re: 32 discordant metronomes (interesting) [Re: Pianolism]
malkin Offline
3000 Post Club Member

Registered: 04/18/09
Posts: 3635
Loc: *sigh* Salt Lake City
What happens when they run down?
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Everything in moderation, including moderation. --Oscar Wilde

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#2006746 - 12/30/12 08:49 PM Re: 32 discordant metronomes (interesting) [Re: Minnesota Marty]
DanS Offline
500 Post Club Member

Registered: 10/28/12
Posts: 666
Originally Posted By: Minnesota Marty
The floor is on a gimbal which creates a slight rocking to the movement of the base. The weights on the metronomes will affect the center of gravity of the platform, and its travel arc speed, and ultimately come into synchronis movement. This would not happen on a fixed, level surface.


great explanation!
_________________________
"In opera, there is always too much singing" -Debussy

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#2006802 - 12/30/12 11:03 PM Re: 32 discordant metronomes (interesting) [Re: malkin]
BruceD Online   content
Yikes! 10000 Post Club Member

Registered: 05/26/01
Posts: 19168
Loc: Victoria, BC
Originally Posted By: malkin
What happens when they run down?


They stop. No?
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BruceD
- - - - -
Estonia 190

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#2006881 - 12/31/12 05:18 AM Re: 32 discordant metronomes (interesting) [Re: Pianolism]
wr Offline
8000 Post Club Member

Registered: 11/23/07
Posts: 8595
This variation on that theme is cool, too...

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#2006923 - 12/31/12 08:16 AM Re: 32 discordant metronomes (interesting) [Re: Pianolism]
dolce sfogato Offline
2000 Post Club Member

Registered: 03/29/10
Posts: 2768
reminds me of Ligeti.
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#2006933 - 12/31/12 08:55 AM Re: 32 discordant metronomes (interesting) [Re: Pianolism]
btb Offline
4000 Post Club Member

Registered: 01/21/04
Posts: 4264
Loc: Pretoria South Africa
Do you chaps know what a gimbal is? Marty does.

“A gimbal is a pivoted support
that allows the rotation of an object about a single axis.” (so sayeth Wikipedia)

Presumably the earthly globe does it’s gimbal twirl ...
"about a single axis" ...
without shaking the leaves off the trees.

Always good to pick up a new word ... must save it to impress at my next cocktail party.

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#2006940 - 12/31/12 09:08 AM Re: 32 discordant metronomes (interesting) [Re: BruceD]
malkin Offline
3000 Post Club Member

Registered: 04/18/09
Posts: 3635
Loc: *sigh* Salt Lake City
Originally Posted By: BruceD
Originally Posted By: malkin
What happens when they run down?


They stop. No?


Of course they stop. (I'm stupid, but not that stupid!)

Do they stay together as they run down or does the synch. come apart?
_________________________
Everything in moderation, including moderation. --Oscar Wilde

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#2006952 - 12/31/12 09:40 AM Re: 32 discordant metronomes (interesting) [Re: malkin]
Minnesota Marty Offline

Platinum Supporter until October 5 2014


Registered: 05/15/12
Posts: 7439
Loc: Rochester MN
Originally Posted By: malkin
Originally Posted By: BruceD
Originally Posted By: malkin
What happens when they run down?


They stop. No?


Of course they stop. (I'm stupid, but not that stupid!)

Do they stay together as they run down or does the synch. come apart?


Oh dear, oh dear, oh dear!

Well, we've now gone from physics to clockmaking. It would depend on the escapement energy in the clock mechanism in relation to inertia/mass. That is, the mechanical energy stored within the spring to be released in a repetitive sequence. The synchronis movement would continue until the springs/escapement could no longer affect the "whole." Once you have less than 50% of the metronomes in action, they would start to go out of synch as they would no longer contain sufficient stored energy to affect the "dead weight" of the stopped ones through the movement of the base.
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Marty in Minnesota

It's much easier to bash a Steinway than it is to play one.

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#2006954 - 12/31/12 09:41 AM Re: 32 discordant metronomes (interesting) [Re: malkin]
BruceD Online   content
Yikes! 10000 Post Club Member

Registered: 05/26/01
Posts: 19168
Loc: Victoria, BC
Originally Posted By: malkin
Originally Posted By: BruceD
Originally Posted By: malkin
What happens when they run down?


They stop. No?


Of course they stop. (I'm stupid, but not that stupid!)

Do they stay together as they run down or does the synch. come apart?


I would think that they pretty quickly run out of sync, since each one is a somewhat crudely constructed mechanical device, and the inherent tension in the spring that drives each will be slightly different.

I would also be very surprised if I were told that a minimal number of mechanical metronomes from the same manufacturer would beat at exactly the same tempo when set at the same tempo on a stable surface. I presume that mechanical metronomes are not manufactured to very high standards, that there are probably infinite variations in the quality of assembly and even in such things as the mass of the weight and the precise positions of the tempo markers on the bar.

Regards,
_________________________
BruceD
- - - - -
Estonia 190

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#2006957 - 12/31/12 09:51 AM Re: 32 discordant metronomes (interesting) [Re: Pianolism]
Minnesota Marty Offline

Platinum Supporter until October 5 2014


Registered: 05/15/12
Posts: 7439
Loc: Rochester MN
btb - Here's another cocktail party word for you:

Horology - It's great when someone is flashing a new Rolex!
_________________________
Marty in Minnesota

It's much easier to bash a Steinway than it is to play one.

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#2007534 - 01/01/13 03:43 PM Re: 32 discordant metronomes (interesting) [Re: Minnesota Marty]
malkin Offline
3000 Post Club Member

Registered: 04/18/09
Posts: 3635
Loc: *sigh* Salt Lake City
Originally Posted By: Minnesota Marty
btb - Here's another cocktail party word for you:

Horology - It's great when someone is flashing a new Rolex!


Not horophilia?
_________________________
Everything in moderation, including moderation. --Oscar Wilde

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#2007589 - 01/01/13 05:43 PM Re: 32 discordant metronomes (interesting) [Re: Pianolism]
kuifje Offline
Full Member

Registered: 11/20/11
Posts: 120
hmm...

I would say that the platform is moved by the force of the springs in the metronome. As it pulls the pendulum to the right that creates a reactive force to the left (and vv)

Center of gravity does not seem to be relevant to me.


Edited by kuifje (01/01/13 05:44 PM)

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#2009751 - 01/05/13 10:26 PM Re: 32 discordant metronomes (interesting) [Re: malkin]
Palindrome Offline
3000 Post Club Member

Registered: 12/22/01
Posts: 3916
Loc: Chicago, IL USA
They will stay together at one frequency.
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There is no end of learning. -Robert Schumann Rules for Young Musicians

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