Tune it where it is

[Frank Cahill]

Hi Newton.

oops I made a mistake on this one. Sanderson says "Never go more than 50 cents
sharp".  This is from his "PIANO TECHNOLOGY TOPISC" #3.  Oh well, it's better to
be embarrased and learn something. I've been limiting myself to 20 Cents.

Newton Hunt wrote:

> > says never raise more than 20 cents sharp or else risk breaking the string.
>
> Show me where Al says this!!  20 cents is 440 to 445.113 Hz.  I would
> only be concerned if the pitch change went from 440 to 460 or almost
> 3/4 semi-tone.
>
> The pitch or cents is not as important as is breaking % and elastic
> limit.  If you are approaching 80 B% you run the risk of breaking
> strings.  If the strings are old and on a high tension scale then
> coming close to 70 B% puts strings at risk.
>
> I think the quote above is a misquote or misunderstanding.
>
> NOT understanding some about scaling, tension, breaking %,
> inharmonicity, friction and the relationship between cents, Hz or B%
> places yourself at string breakage risk.  Understanding something of
> these factors gives you more flexibility to do what you want to do
> without the risk.
>
>                 Newton

--

Frank Cahill
Associate Member, Piano Technicians Guild
Northern Va