pitch raise question

[Mark Dierauf]

I think that the default you're referring to in TL is for 25 *cents*,
with the bass defaulting to 5 cents. The other figures are correct,
except Bob recommends 12% (I think) in the bass. IOW, the % figures are
used to design an "overpull curve" that will leave each string close to
its target pitch, while the cent limiters are there to avoid breakage. I
find these figures to work pretty well for pitch-raises up to about 20
cents or so...much past that and I generally plan on an additional pass
in overpull mode before fine tuning. I don't think that I've ever had a
string break using this system that wouldn't have broken anyway, so I
suspect that the limiters could be boosted a bit on most pianos.

- Mark Dierauf

-----Original Message-----
From: Leslie Bartlett [mailto:l-bartlett at sbcglobal.net] 
Sent: Saturday, December 23, 2006 11:06 AM
To: 'Pianotech List'
Subject: RE: pitch raise question

Interesting.  TL has a default of 25% through but recommends changing it
to
29% at the bass/tenor break, then 34% somewhere about C5, and about G6,
I
think, recommends tapering off to 13% at C8.  Obviously there is some
"flexibility" in pitch raise formulas.....  Obviously since I don't have
the
exact locations firmly locked into the senile mind, I "fiddle" here and
there, and seem to get it to work rather nicely. I also make alterations
if
the piano is significantly (40+ cents etc.) out of tune.

les bartlett

-----Original Message-----
From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On
Behalf
Of Farrell
Sent: Saturday, December 23, 2006 5:26 AM
To: Pianotech List
Subject: Re: pitch raise question

>I don´t know how other ETD´s work, but verituners default setting for 
>pitch raise overpull is 36 % in the diskant. 

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