[CAUT] Sperrhake Harpsichord wire

[Mccoy, Alan]

Fred,

Try Scaleripper. You use a mac though and I think scaleripper is for Windows only. Still this is a good program where you can experiment all you want. Or Pscale, but it too is for windows only.

http://www.blademediainc.com/download.php

Alan


-- Alan McCoy, RPT
Eastern Washington University
amccoy at ewu.edu
509-359-4627 (message Pacific time)
509-999-9512 (cell Pacific time)


________________________________
From: Fred Sturm <fssturm at unm.edu>
Reply-To: CAUTlist <caut at ptg.org>
Date: Fri, 4 Dec 2009 12:19:53 -0800
To: CAUTlist <caut at ptg.org>
Subject: Re: [CAUT] Sperrhake Harpsichord wire

On Dec 4, 2009, at 12:35 PM, Ron Nossaman wrote:

>>    All pianos and harpsichords have foreshortened scales. It
>> doesn't take a spreadsheet to see that if you strung a piano with
>> 13 wire throughout, the tension would decrease as you went down the
>> scale, and the percent of breaking point would also decrease. And
>> that the same thing would be true if you started at the point where
>> any other gauge began and strung the lower portion of the piano
>> with that gauge.
>>    Or is there some fallacy I am missing in this reasoning?
>
> You mean other than the fact that changing gage size on any given
> speaking length at a given pitch will change the calculated tension,
> but not the break%. I don't really care, nor do I see any
> connection. That single note in question doesn't care either, what
> the guys an octave away are doing, or how any of the rest of the
> scale is constructed.


        The difference in our thinking is that I am basing mine on an
existing scale, not some theoretical any length/any pitch. I am
assuming a scale that either works or comes close. That's what I deal
with in the real world, so the principles that apply work just fine. I
am not stating some theoretical thing to apply to any length or any
pitch. Obviously there are a lot of impossibilities out there.
        Thanks so much for the formulae, but what I asked for was a
spreadsheet with a real life piano scale included. If you have one and
are willing to share it, I'd be happy to see it, and to enter some
gauges to see whether or not what I have asserted is true. If not, we
are just arguing at cross purposes and might as well not bother.
Regards,
Fred Sturm
University of New Mexico
fssturm at unm.edu






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