Pitch Drop

Ron Berry ronberry@iquest.net
Thu, 30 Mar 1995 16:33 -0500 (EST)


>
>Has anyone any idea about how much pitch drop is apportioned between
>humidity drop and stretching of strings?
>

I think that pitch drop from stretching of strings only happens for about
the first 2 years.  New pianos go out of tune differently.  Pianos with new
strings go flat in the bass because the loops in the strings have to settle.
In older pianos the bass almost never moves.  I think that most of what we
call stretch in the strings is really the various bends in the strings
settling in.  By tapping at the hitch pin, bridge pins and over the capo bar
or agraffes you can accellerate settling in these bends and make the piano
be more stable sooner.

I think that most of the pitch change in a piano comes from humidity.  I had
a family with an Acrosonic that was kept in a house that was controlled like
an incubator.  I was almost embarrassed to charge for the tuning because it
stayed so well.  Then they gave it to their daughter who moved to an
apartment.  You couldn't believe it was the same piano.

Ron Berry
ronberry@iquest.net

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