beckets

[Don]

Hi Ron,

Of course seating everything can't control seasonal differences. That was
not the issue. 

Let's take the example of a quality six foot grand with humidity control
(Damppchaser or better). Take two contiguous notes, or several pairs of
adjacent contiguous notes (which I did) tap one set everywhere you can
think of, and leave the next set untreated. Alternate them randomly. The
results were clear that unisons on the tapped pair (six wires) were better
than on the untapped pair.

At 07:10 PM 8/21/2003 -0500, you wrote:
>
>>Hi Ron,
>>
>>But your limits as I remember are somewhat broader than some others. If I
>>remember you don't consider 4 cents a significant pitch change. (over the
>>whole piano). As a musician I agree--and as a tuner I disagree.
>>
>>Mark, I have done limited testing of tapping vs not tapping--and tapping
>>appears to lead to better long term stability.
>
>Hi Don,
>That's right, 4 cents movement with a seasonal change is considered to be 
>well under control around here, and likely grounds for putting the tuning 
>off another six months. That movement is both up and down in a year's time, 
>not just down, and not down just one time. It's up and down every year. How 
>can this tapping and seating limit the rise of pitch in summer, or the 
>lowering in winter? There's no reason I can think of, and no evidence I've 
>seen (and yes, I've seated coils and such) that this will limit tuning 
>changes with humidity swings unless you changed the climate control 
>conditions at the same time. If so, it's the climate control changes that 
>made the difference. Why would tapping make any difference?
>
>Ron N
>
>_______________________________________________
>pianotech list info: https://www.moypiano.com/resources/#archives
>
>

Regards,
Don Rose, B.Mus., A.M.U.S., A.MUS., R.P.T.

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