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#2038298 - 02/24/13 06:54 AM Re: How to achieve Horowitz-style responsive action? [Re: renenkel]  
Joined: May 2003
Posts: 1,727
Ed Foote Offline
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Ed Foote  Offline
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Joined: May 2003
Posts: 1,727
Tennessee
Originally Posted by renenkel
Originally Posted by Ed Foote
[Re: Horowitz piano] What I found was that the hammer blow was near 1 5/8", let-off was at the string, drop was nearly as close. Springs were normal to weak, dip was shallow, I would guess .360". Hammers were light,though I didn't weigh them. Dampers lifted extremely late. Repetition levers were set so that the jacks barely touched the knuckle and the jacks were slightly proximal to the normal alignment. Checking was exremely high.

Ed, does "proximal" mean closer to the hammer pivot side of the knuckle than usual?


Greetings,
Proximal means closest to the player, distal (distance) refers to the opposite. The proximal side of the jack doesn't touch anything but the stop felt, and the distal edge of the jack aligns with the distal edge of the knuckle's core, etc.

By setting the jack closer to the performer, (proximally), the process of escapement is shortened, ( assuming a beginning point as that point at which the tender touches the pad and/or drop screw touches the drop pad), and greater danger of it skipping out under a ff blow. It is a trade-off, (like the mix in a carburetor ie, maximum response is right next to engine failure), The farther proximal they are moved, the more consistent the tech has to be, or the law of averages will visit, usually during a climatic moment in performance, and a great, crashing, note will be missing. People remember that for a lifetime. DAMHIK
Regards,

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#2038305 - 02/24/13 07:03 AM Re: How to achieve Horowitz-style responsive action? [Re: renenkel]  
Joined: Mar 2008
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Olek Offline
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Olek  Offline
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Joined: Mar 2008
Posts: 9,230
France
and the leverage at the beginning of the stroke is higher. Cheating jacks can be tested once, twice, etc..

<it is amazing how much we can interfere with hammer acceleration, just with different type of jack location.

Last edited by Olek; 02/25/13 07:10 AM.

Professional of the profession.
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I wish to add some kind and sensitive phrase but nothing comes to mind.!
#2038788 - 02/25/13 02:41 AM Re: How to achieve Horowitz-style responsive action? [Re: Ed Foote]  
Joined: Jan 2008
Posts: 15
renenkel Offline
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renenkel  Offline
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Joined: Jan 2008
Posts: 15
Canada
Originally Posted by Ed Foote
The farther proximal [the jacks] are moved, the more consistent the tech has to be, or the law of averages will visit, usually during a climatic moment in performance, and a great, crashing, note will be missing. People remember that for a lifetime. DAMHIK

DAMHIK? Wow, sounds scary! :-) Hope you weren't working for Horowitz at the time! :-) :-)

#2038810 - 02/25/13 03:38 AM Re: How to achieve Horowitz-style responsive action? [Re: renenkel]  
Joined: Mar 2008
Posts: 9,230
Olek Offline
9000 Post Club Member
Olek  Offline
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Joined: Mar 2008
Posts: 9,230
France
Here you can hear how is the sound with light hammers :

http://www.youtube.com/watch?v=6dXUgPVjnD0&feature=share&list=PL550F1747A716EEA7


Professional of the profession.
Foo Foo specialist
I wish to add some kind and sensitive phrase but nothing comes to mind.!
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