[pianotech] A432 Tuning Fork

[Ron Nossaman]

On 1/19/2011 12:29 PM, J Patrick Draine wrote:
> Wim,
> Check your math! 6 cents FLAT of A-440 would be roughly 438.5 cps. (if
> it was PLUS 6 cents it would be 441.5 cps).
> Patrick (no math wiz) Draine
>
> On Wed, Jan 19, 2011 at 1:24 PM, <tnrwim at aol.com
> <mailto:tnrwim at aol.com>> wrote:
>
>     Jim
>     An A fork that is 6 cents low is not at A432. At A, there are four
>     cents per beat. So a fork that is 6 cents flat is at A442.5. It
>     shouldn't take much to file throat of the fork to reach 440.
>     Wim


A prime example of minutiae over basics. The math doesn't matter a whit 
when you're changing the pitch of a tuning fork, but filing in the right 
place does. Unless I'm in the wrong universe, to raise pitch you file 
the tine tips, not the throat.
Ron N