more on floating pitch

[John Formsma]

A correction on what I wrote below ...
With the piano at the pitches Mike originally described, I'd tune between
A441 and A442.  What I wrote below is for what would be done had the piano
been tuned at A439 in March.  Tuning the piano now at A440 would put the
piano in flatter condition in the winter.

The topic was pitch floating, right? Hello, John, am I here today? <G>

--
JF, whose assuming mind raced too far ahead of what his fingers typed


On Thu, Aug 21, 2008 at 2:14 PM, John Formsma <formsma at gmail.com> wrote:

> I would assume the problem came when the piano was tuned to A440 in March.
>  This would likely be just before the RH begins to rise (at least it does
> here in Mississippi around that time).  If the piano had been tuned to A439
> then, it would be closer to A440 now.
> I would agree that a one-pass tuning might not have every note "spot on."
>  However, one could get the piano in decent musical shape with a one-pass
> tuning ... even with numbers that you mention below. Since this is a school
> piano, and schools generally won't pay for a pitch correction, I'd do the
> best I could with a single pass.
>
> My attempt would be stabilizing the entire middle section to A440 first.
>  (By tuning all unisons there.)  Then begin working on the treble, tuning
> slightly flat octaves, and tuning unisons as you go.  By listening to your
> progress, it will become evident if you've chosen the right amount of
> "flatness" to your octaves.  My first try would be tuning the treble so that
> the octave-fifth has a beat of 1-2 bps.  This would be perhaps even a
> slightly flat double octave.  But, it usually goes back up when it's that
> sharp, so you anticipate that.
>
> If you have to correct some, you have to correct some. <G>  It's not that
> hard with shimming.  I'd just correct the worst ones in the time that I got
> paid for.
>
>
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