Buzz in an S&S D

[Andrew and Rebeca Anderson]

With a 10% change in humidity and the upper cover off, the pitch were 
the nasty resonance occurred drifted north a semi tone.  After 
discussing it with the theater manager I learned that someone had 
been brought by the dealership to repair the finish on the 
piano.  There was steel wool all over the soundboard and we suspected 
FOs out of sight under the plate.  I swung a flexible steel ruler 
around a bit but couldn't scare anything out.  The ribs in the 
neighborhood looked tight and there were no glue flakes apparent.
We decided we could live with it until the piano could be cleaned out 
and we can eliminate that possibility.  I did check strings and 
various duplex segments all over to no avail.   Pressing on the 
soundboard at one point does help alleviate it.

Andrew Anderson

At 11:12 AM 3/2/2008, you wrote:
>More obvious stuff. Have someone play while you look. Isolate 
>strings, press on different segments of the wire and felt mute any 
>offending sections to get through the concert. Also, you can leather 
>covered wedge mute a rib or soundboard section thereby once again 
>treating the symptom rather that the cause in the interest of the 
>concert at hand. Careful inspection with articulating mirror and 
>light. String interference with bridge notching. Pull the lid and 
>have someone play while you press on everything you can find. Good luck.
>Fenton
>----- Original Message ----- From: "Mark Schecter" <mark at schecterpiano.com>
>To: "Pianotech List" <pianotech at ptg.org>
>Sent: Saturday, March 01, 2008 10:51 PM
>Subject: Re: Buzz in an S&S D
>
>
>>Don't forget to check obvious things like, the fallboard flap 
>>vibrating against the fallboard, a loose pedal lyre brace, the 
>>short stick vibrating against its slot in the long stick, the lid 
>>fly vibrating against the main body of the lid, the key retainer 
>>strip nuts being loose, and others I can't think of now because 
>>it's late. Good luck.
>>
>>-Mark Schecter
>>
>>Andrew and Rebeca Anderson wrote:
>>>snip <
>>
>>>I will be expected to get rid of the perturbing buzz prior to the 
>>>concert (Sunday tomorrow).  I will be looking closely and try to 
>>>visually identify the problem.  I am cautious with the stuff too.
>>>
>>