[CAUT] pitch under the lights

[Don Mannino]

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Barbara Richmond  wrote=20
=20
> PS  How long does it take a hot piano to go back up in pitch?  (Not a
joke, just a question.)=20
=20
As Laurence wrote, it will slowly settle back.  What happens with
temperature changes is that at first the strings warm up and go flat,
then gradually the plate warms up which makes the pitch go sharp a
little.  If you close up the piano during the opening parts of the
concert, it will drift a little, but the plate changes slowly.  The
strings will then warm up quickly once the piano is in place under the
lights for the performance.
=20
DM

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