[CAUT] pitch rise

[Barbara Richmond]

Hi Richard,

I was wondering about this myself.  Though I only noticed it when I started
tuning unisons "as I go."  The spot that goes up most in my case is the
first treble section of a D on stage.  The piano is usually within a few 
cents (or less) of 440 before tuning.  

Barbara Richmond, RPT


----- Original Message ----- 
From: "Richard West" <rwest1 at unl.edu>
To: "College and University Technicians" <caut at ptg.org>
Sent: Thursday, March 09, 2006 9:44 AM
Subject: [CAUT] pitch rise


> With the discussion of unison drift, I have a question which may be
> related.  What is the cause for pitch rise while tuning?  I can
> understand why the pitch might fall, especially if there's a significant
> pitch change.  But I'm not talking about a radical pitch alteration.
>
> Here's the scenario.  I'm working on a newer or rebuilt piano with tight
> pins and still relatively stretchy strings.  I'm trying to stabilize the
> instrument, but it's being stubborn.  I'm having to be more aggressive
> with my tuning technique, i.e., in order to settle the pitch I have to
> first pull the string higher than I like in order to move the tight pin
> and then allow the stretchy string to settle back to the pitch I want.
> As I move up the piano, the pitch  behind me tends to creep higher,
> sometimes to the point I have to retune the note below.  I'm not a
> pounder, so I don't think that I'm beating the piano too hard.  I'm not
> trying to pitch raise/lower the piano, just give it a good solid tuning.
>
> What can I do to prevent this "phenomenon?"  Does anyone else experience
> this?  What is the cause?
>
> Richard West
>
>
> _______________________________________________
> caut list info: https://www.moypiano.com/resources/#archives
>