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Re: Tone Production [Re: Colin Miles] #2771778
10/12/18 09:35 AM
10/12/18 09:35 AM
Joined: Nov 2013
Posts: 3,861
Southwestern Ontario
P
prout Offline
3000 Post Club Member
prout  Offline
3000 Post Club Member
P

Joined: Nov 2013
Posts: 3,861
Southwestern Ontario
Originally Posted by Colin Miles
Prout - as a scientist I totally understand where you are coming from. But as an erstwhile engineer, like Rubberfingers, I will doubtless argue in considering the mechanics involved. Also I thought there were sufficient differences in the graphs - I apologise if I am reading them wrongly. And yes these kind of arguments date back a long time - in my case more than 50 years!
I appreciate your comments. Thanks.

If you look closely at the second set of graphs and compare the left and right graphs of each of the three measured parameters from the instant of hammer/string (hs) contact, you will see that the post contact key and hammer velocities are nearly the same and that the waveform is essentially identical, in spite of the left graph set showing a pressed key and the right graph set showing a struck key.

Note that the final velocities of the key and hammer at string contact and the amplitude and partial structure of the resulting waveform are the same left to right as well. It clearly shows that the whatever happens with the action prior to the hammer strike, the result is the same.

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Re: Tone Production [Re: prout] #2771825
10/12/18 12:34 PM
10/12/18 12:34 PM
Joined: Sep 2017
Posts: 459
South Wales
C
Colin Miles Online content
Full Member
Colin Miles  Online Content
Full Member
C

Joined: Sep 2017
Posts: 459
South Wales
Originally Posted by prout
Originally Posted by Colin Miles
Prout - as a scientist I totally understand where you are coming from. But as an erstwhile engineer, like Rubberfingers, I will doubtless argue in considering the mechanics involved. Also I thought there were sufficient differences in the graphs - I apologise if I am reading them wrongly. And yes these kind of arguments date back a long time - in my case more than 50 years!
I appreciate your comments. Thanks.

If you look closely at the second set of graphs and compare the left and right graphs of each of the three measured parameters from the instant of hammer/string (hs) contact, you will see that the post contact key and hammer velocities are nearly the same and that the waveform is essentially identical, in spite of the left graph set showing a pressed key and the right graph set showing a struck key.

Note that the final velocities of the key and hammer at string contact and the amplitude and partial structure of the resulting waveform are the same left to right as well. It clearly shows that the whatever happens with the action prior to the hammer strike, the result is the same.


So it possibly comes down to a question of whether these very minor differences can be detected by us humans!


Roland LX7

South Wales, UK
Re: Tone Production [Re: GoldmanT] #2771993
10/12/18 10:43 PM
10/12/18 10:43 PM
Joined: Dec 2012
Posts: 4,870
Seattle, WA USA
E
Ed McMorrow, RPT Offline
4000 Post Club Member
Ed McMorrow, RPT  Offline
4000 Post Club Member
E

Joined: Dec 2012
Posts: 4,870
Seattle, WA USA
If a hammer is striking the string before the damper is clear, the action is not properly regulated and any pianistic techniques to somehow mitigate this mechanical issue are not ones that would find a more general application.

There are some technicians who in an effort to "lighten" the touch they place the damper lift later in the key stroke. This creates many issues. One you may notice is when escapement and damper lift occur simultaneously instead of damper lift preceding the escapement point which is the norm, is that playing soft and even becomes impossible.

The most productive way to lighten and action is to reduce the weight of the hammers. A small amount of reduction has a profound effect on control. Even if the down weight is reduced by only 1-2 grams; becuase the hammer is the predominant factor in the inertia of the action, you will notice a big difference when you play.


In a seemingly infinite universe-infinite human creativity is-seemingly possible.
According to NASA, 93% of the earth like planets possible in the known universe have yet to be formed.
Contact: Ed@LightHammerpiano.com
Page 2 of 2 1 2

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