Noisy Dampers on Shift

[Allen Wright]

Tom,

Quite often I've encountered pianos in which the dampers were much  
noisier on return when the una corda was shifting the hammers off the  
left string. Regulating the shift so that they continue to strike the  
left string (only moving 2/3 of the way towards the string groove to  
the left) often tends to dramatically improve that. Perhaps that's  
what you mean by mentioning "phase shift"?

Have you tried that?

Allen Wright


On Jul 16, 2008, at 5:54 AM, Thomas Cole wrote:

> I just acquired a client who bought a new F183 Fazioli. Obviously  
> it's a very nice piano, but the owner is complaining of improper  
> damper function on several notes starting above C4, especially on  
> shift. The hammers all shift off of the first string in Faziolis so  
> I can see that there might be some phase shift between the strings  
> of each unison challenging the dampers, but he's only complaining  
> about a handful of notes in the fourth octave.
>
> The fact that the owner is formerly a synth player is likely why  
> this effect was so noticeable to him, but I must admit the buzzy  
> cutoff on a slow release of the key is not at all subtle. Even the  
> dealer over the phone could hear it.
>
> So far, the trichord wedges are exerting equal pressure on the  
> strings (plucking doesn't reveal any leaks or uneven damping) and  
> the dampers follow when pressing on the strings. The technician who  
> prepped the piano didn't notice a problem but who checks damper  
> function on shift?
>
> Anyone care to take a shot at it?
>
> Tom Cole






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