[pianotech] A432 Tuning Fork

[Malinda Dobrins]

----- Original Message ----- 
From: "Roge Domeny" <rogerdomeny at att.net>
To: <pianotech at ptg.org>
Sent: Thursday, January 20, 2011 12:43 PM
Subject: Re: [pianotech] A432 Tuning Fork


> Jim is correct. They do not allow any devices with visual displays in the
> exam room. I was allowed to keep my cell phone, but I assured them it 
> would
> stay in my pocket while I was at the test piano.
>
> Make sure that you are using a test interval with coincident partials at 
> the
> fundamental of A49, such as the F21-A49 M17 = F21-Calibrated Pitch Source
> test, adjusting F21 to achieve a discernable beat rate if necessary. DO 
> NOT
> use a test that has coincident partials at the second (or higher) partial 
> of
> A49. For example, the F33-A49 M10 has coincident partials at A61, which is
> the second partial of A49. Tests that rely on higher partials of A49 will
> not be accurate because the inharmonicity that is present in the piano 
> will
> not be matched by the pitch source. Learn to set pitch with a test 
> interval
> that has coincident partials at the fundamental of A49 (such as the 
> F21-A49
> M17 test), and you will nail it every time, whether you use a fork or an
> electronic pitch source. That is, as long as your pitch source is 
> accurately
> calibrated.
>
> Roger Domeny
> Domeny's Piano Service
>