Sudden damper buzz syndrome

[Geoff Sykes]

Greetings all --
 
Last week I tuned a customers Kawai grand piano. The customer was out of
town so he left me a key to his studio. He returned the other day and while
he is happy with the tuning and the other repair work I completed he
mentioned that all the wound strings are now exhibiting a buzz when the
damper comes into contact with the played string. Once the damper has
completely engaged the buzzing stops and the strings damp correctly. He says
it is objectionably noticeable only on the entire wound bass string section
of the piano. This is not something that I noticed while I was there so I'm
curios as to your thoughts on what could have caused this and what I might
be able to do to affect a timely fix. FWIW, he lives a couple of miles from
the beach but has a DC de-humidifier installed. The piano also lives in a
small, relatively well sealed but otherwise non-climate controlled garage
studio. 
 
-- Geoff Sykes
-- Assoc. Los Angeles.
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