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#2038298 - 02/24/13 06:54 AM Re: How to achieve Horowitz-style responsive action? [Re: renenkel]
Ed Foote Offline
500 Post Club Member

Registered: 05/03/03
Posts: 972
Loc: 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]
Olek Online   content
6000 Post Club Member

Registered: 03/14/08
Posts: 6344
Loc: 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.


Edited by Olek (02/25/13 07:10 AM)
_________________________
Isaac OLEG - http://picasaweb.google.fr/PianoOleg pro

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#2038788 - 02/25/13 02:41 AM Re: How to achieve Horowitz-style responsive action? [Re: Ed Foote]
renenkel Offline
Junior Member

Registered: 01/08/08
Posts: 15
Loc: 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! :-) :-)

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#2038810 - 02/25/13 03:38 AM Re: How to achieve Horowitz-style responsive action? [Re: renenkel]
Olek Online   content
6000 Post Club Member

Registered: 03/14/08
Posts: 6344
Loc: France
Here you can hear how is the sound with light hammers :

http://www.youtube.com/watch?v=6dXUgPVjnD0&feature=share&list=PL550F1747A716EEA7
_________________________
Isaac OLEG - http://picasaweb.google.fr/PianoOleg pro

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