Noisy Dampers on Shift

[Thomas Cole]

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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