cellophane

[Jon Page]

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At 08:47 AM 3/25/2002 -0800, you wrote:
>I just got a call from a client who said it sounded like there was 
>cellophane in her piano when she played. It made her jump up and look to 
>see what was "in there". She played a few bass notes over the phone and 
>you could hear a definite action clatter. Then she noticed it was 
>occurring when she released the key. I guess I'm revealing my age when I 
>say I know the "sound of cellophane". I think the thing noticed most about 
>cellophane was the rustling noise that had an unusual crackling/pop noise 
>with it. Nothing quite like it. If you guys don't nail this one, I'll be 
>surprised. This is probably going to take me into my next field of study. 
>I have a good understanding of key dip/hammer blow distance/let off though 
>I've heard talk of a safety factor/relationship that I would like to know 
>more about. I've taken Nick Gravanite? Action geometry and Wally Brooks, 
>effective weight control and couple of grand regulation classes. Now to 
>the repetition lever. My guess, and it's purely a guess, the noise is the 
>rep lever going through it's cycle. Guy Nichols class, Extreme measures, 
>he said "pop and buff" the rep springs. What's the best way to do that and 
>is that anywhere close to my problem noise?
>By the way, Guy's class is a good one to take after lunch. you won't fall 
>asleep.
>Keith R

> >occurring when she released the key.

My first inclination is towards damper noise. Harder felt will buzz on the 
vibrating string,
even more so if there is a slight amount of rust deposits on the felt from 
the string.


Regards,

Jon Page,   piano technician
Harwich Port, Cape Cod, Mass.
mailto:jonpage@attbi.com
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