Terry Farrel: A440 or bust! (Or not.)

[David Love]

Differences in pitch shift due to humidity swings are most likely related
to the part of the soundboard that the strings are connected to.  Since the
middle of the soundboard will rise and fall the most with changes in
moisture content, the pitch of the strings which connect to the middle of
the board (mid to low tenor) are going to change the most.  The extremes,
which are anchored more closely to the rim, are going to move the least.

David Love
davidlovepianos@earthlink.net


> [Original Message]
> From: Charles Neuman <piano@charlesneuman.net>
> To: <pianotech@ptg.org>
> Date: 1/23/2004 10:51:19 AM
> Subject: Terry Farrel: A440 or bust!  (Or not.)
>
> That reminds me: Around these parts (Long Island), it's really cold
> outside and dry heat makes pianos flat. I understand it is common to leave
> the piano a little flat in the winter and a little sharp in the summer.
> How much is an OK amount to be flatter than A440?
>
> Also, on a recent tuning I did, different parts of the piano were flat by
> different amounts. In the temperament region, it was flat by about 15
> cents. In the upper treble and parts of the bass, the strings were only a
> couple cents flat, if any. Some were even sharp. I suspect the previous
> tuner hadn't stretched the piano much. On the other hand, could this have
> been due to the change to the dry environment this winter?
>
> Charles Neuman
> PTG Assoc, Long Island
>
>
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