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#2253276 - 03/27/14 08:52 PM damper delay in bass
7naturals Offline
Junior Member

Registered: 04/09/12
Posts: 18
Dear group,
I have a 14 year old 9 foot concert grand that had been in storage for a few years and I am looking to have the dampers better regulated and aligned as I have noticed some after ringing in the upper register and can visually see some of the dampers not square on the strings and a few are not lifting at the same time as the others etc..
In examining the dampers further, I also noticed something else maybe one of you have run across.
I noticed that the single bass wire dampers , notes 1-8, are raising first compared to the rest of the dampers. Dampers 1-8 raise exactly all together first by about 2-3mm and then the rest of the scale lift. They obviously are also the last to come down[delayed].

So the question is, Would there be a reason to delay the damping on the single wire bass strings, or are they just out of regulation.
It seems interesting that 1-8 all lift together first and are the last to come down.
The only thing I could think of is that it may have been on purpose to have some passive resonance with the lower bass section briefly left open. Any ideas appreciated before I have the dampers regulated as I dont know if I should have them left that way, or have them regulated evenly with the others the same all the way across..

thanks all..

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#2253346 - 03/27/14 11:52 PM Re: damper delay in bass [Re: 7naturals]
Ed McMorrow, RPT Online   content
3000 Post Club Member

Registered: 12/09/12
Posts: 3894
Loc: Seattle, WA USA
I assume you are examining the damper lift timing using the damper pedal.

If the piano was in storage on its side, the damper guide rail could have shifted to the bass side.

If so there are many things that could happen individually or in combination to result in the lift timing you observe.

The monochord damper felts may be softer than the bi-chord felts. The monochord dampers could have stronger return springs on them which increases the settling rate of the felts. The lift tray could be warping slightly.

This should give you some idea.
In a seemingly infinite universe-infinite human creativity is-seemingly possible.
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#2253400 - 03/28/14 06:53 AM Re: damper delay in bass [Re: 7naturals]
Olek Offline
9000 Post Club Member

Registered: 03/14/08
Posts: 9230
Loc: France
Some techs do so to make a "sort of" tonal pedal, but the most usual is to allow the treble to open while the basses are still damped a little. Half pedaling... Not easy. Other reasons as stated above.
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I wish to add some kind and sensitive phrase but nothing comes to mind.!

#2253610 - 03/28/14 04:54 PM Re: damper delay in bass [Re: 7naturals]
7naturals Offline
Junior Member

Registered: 04/09/12
Posts: 18
Thanks ed and olek,
Ed,Yes when I press the pedal I notice the dampers 1-8 lift perfectly together before the others. I thought it had to be timed that way on purpose but didnt know. I also didnt know whether to leave it that way or have it timed to the rest evenly..I have copied your list of things to look for thanks for that....
Olek,The half pedaling adjustment with the dampers is kind of what I thought it may be doing, I wish I was that good to take advantage of it..
Thanks again..

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#2253653 - 03/28/14 06:56 PM Re: damper delay in bass [Re: 7naturals]
Olek Offline
9000 Post Club Member

Registered: 03/14/08
Posts: 9230
Loc: France
I mostly have seen that done on uprights.
Anyway if you have a tonal pedal this is really unnecessary (and even then, when you play you may notice the basses are making a background noise, while the sustain pedal is more useful in adding luminosity to treble while keeping the basses quiet.)

the way the medium dampers are leaving the strings make that half pedal automatically on some pianos, then the high treble really needs a "hair before" it is not really noticed when pushing on the pedal slowly, in my experience.
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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