smooth delicate and creamy

[Andrew & Rebeca Anderson]

I understand that when you do a pitch-raise you overpull by a per-centage 
of how flat it is.  I usually set the global offset to ten-percent 
overpull.  I've been told this is too conservative, but on better pianos it 
comes out right on pitch, that is A4 comes out at 440.  Now is that what we 
are referring too? or is this a discouragement of the method of pulling the 
unison over pitch and then easing down to pitch generally billed as a way 
to leave the pin stable?  I've noticed it doesn't work so well on low 
tension strings under capo bars (I hate those Kawais that are all capo 
bars).  Is it a discouragement of doing this to unisons that happen to be 
very close to pitch but you set anyway for "stability"?

Andrew

At 06:23 PM 11/9/2003 +0000, you wrote:
>Hello Andrew
>You said:
>"I'm curious, what do you mean when you say, "pich correct too much"?"
>It was Don Rose who said:
> >"Probably the big "mistake" is that you are trying to pitch correct too
> >much. Next time you tune a piano that is mere 4 cents flat (at A4)--take
> >the time to measure A3, A4, A5, and A6 after you have finished. I suspect
> >you will find they are not where you placed them originally."
>
>With which I thoroughly agree.
>I think the analogy will be found in simply allowing one string of a guitar
>or fiddle to go VERY flat. Just see what has happened to its adjacent
>strings! They have gone sharp#. Now take the piano with 240 odd strings at
>much higher tension than the guitar or fiddle and you can visualise what Don
>is getting at. If you tune much higher than needed (pitch correct too much)
>the end result will be wrong. In pitch rises you have to carefully consider
>the effect of changing the pitch so that it ends up almost (and sometimes
>absolutely = equivalent to a hole-in-one) bang on target. I have made quite
>a study of this phenomena and derived from my findings a very simple system
>which, when applied to a piano as much as a semitone (100cents) flat will
>get it to pitch (A=440) in one pass. See archives for "Quadrant System" - or
>it might be under "Raising Don Rose to Standard Pitch" - And I still hope he
>forgives me the liberty I have taken!
>Regards
>Michael G (UK) in darkest Sussex Downs with sporadic fireworks
>
>
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