Pitch Raisins

[Ron Nossaman]

At 11:49 PM 3/16/96 -0700, you wrote:


>>String breakage incidence goes up with the amount of overpull. The reason
>>overpull and resultant string breakage is higher when starting in the middle
>>is that this is the center of the board and will deflect further during the
>>pr than any other portion of the board. Starting at A1 and progressing
>>sequentially to C88 loads the board from the edge (which doesn't deflect as
>>much with a given load) to the center (which has already been forced down
>>somewhat by the already tensioned strings). The result is that the overpull
>>is less and string breakage goes down accordingly. From the center out, the
>>soundboard acts like a class two lever, for instance a wheelborrow. In this
>>analogy, the rim is the wheel, the center is where you grab the handle, and
>>the load goes in between. My guess is that the results of an "edge first,
>>center last" pitchraise procedure would be even better if you were to
>>alternate from both ends and work toward the center tuning the unisons as
>>you go. It would be pretty slow, but if any of you digitoids out there in
>>electronicland have ever tried, or would care to try it, I'd be curious to
>>know how it works. I'd try it myself, but I don't have access to the
>>hardware (it's tough to do with a fork <G>).
>>
>That is a real interesting analogy, will have to think on that one.  It
>sounds like a fascinating experiment too.  Seems like a good way to do it
>would be with two (human) tuners with two Accu-Tuners starting at each
>end.  Sounds like fun.  If nothing else, the piano would get raised twice
>as fast!  ;-)

Come on Dean, where are you going to find two tuners who are willing to meet
in the middle?  <MAJOR grin>  Gotcha!

 Ron Nossaman