[pianotech] Pitch raising limit

Conrad Hoffsommer hoffsoco at luther.edu
Thu Aug 6 05:04:25 MDT 2009


Folks,

I go with John, with a small addition.

If it is at -200¢, THERE IS PROBABLY A GOOD REASON!

Some confession and anecdotal reason to follow:

Many years ago I was called out to do a tuning on an old piano which
hadn't been tuned in years. That was an understatement. It was an
exquisite birdcage from the 1840s and probably hadn't been tuned in
decades, if not a century.

They wanted it "to play".  I learned a lot about regulating a birdcage
that day and, with no broken or missing parts, I was able to get
everything to work.   The tuning, however, was a different story.  I
checked pin tightness of the flattest strings and found very little.

I explained the situation with the customer and we agreed that I
should tune it as high in pitch as the loosest of the pins would hold.
 That wound up being at -400¢. I set C# to my A fork and went from
there.

In the years since, I've had to tune several others at low (really
low) pitches, but always at even dollars so that, if they are adept at
transposing, they can play pieces without jarring those with "perfect
pitch".

If I find a piano at even dollars flat, I naturally suspect someone
previously had done the same thing.  YMMV, of course.



On 8/5/09, John Formsma <formsma at gmail.com> wrote:
>

> However, you should first determine if the piano is structurally sound
> before doing the pitch raise. For this reason, many tuners would start by
> tuning A4 to A442 (not going higher than that) on the first pass. By the
> time you finish, you'll know if strings will break, or if the plate has
> cracked. <slight grin>  Seriously, you might be dealing with a piano that
> can't be tuned at A442 for various reasons: wasn't designed to be tuned
> there, the plate could be cracked, or the pinblock separated from the back,
> etc.
> JF

-- 
Conrad Hoffsommer, RPT - Keyboard Technician
Luther College, 700 College Dr.,
Decorah, Iowa 52101-1045
1-(563)-387-1204 // Fax 1-(563)-387-1076


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