Tension Difference between 435cps and 440cps

[Don]

Hi Joesph,

The first referrence I know of to "international" pitch was 1910 from the
American Federation of Musicians.

At 10:14 AM 09/18/2001 -0700, you wrote:
>List,
>Years ago, I calculated the difference between 435cps and 440cps. The
>average difference was approx. 5 lbs per string. I'll let you do the math.
>Most "plates" are way over-engineered. However, there are those who designed
>within a "gnat's eyebrow", so caution is always advisable. Hope this helps.
>While we're on the subject of pitch, I personally have not been able to
>ascertain WHEN "International Pitch" was established or even who did
>establish it. There doesn't seem to be any documentation regarding this
>pitch establishment. If any one out there knows, please post it for all to
>see.
>Regarding Square Grand tuning pitches, etc., if you are tuning one with the
>original strings, it is best to use 435cps as a standard. As these
>instruments should NEVER be used for students, the pitch difference is of no
>consequence. I should say that all instruments of this kind should be tuned
>to their "designed pitch", as they will be more stable and the chance of
>structural damage is lessened. If you are "restringing" one of these
>instruments, you should ALWAYS evaluate the scale using 435cps, (or other
>standard, such as 425cps for instruments that are pre-1870's), then reset
>the pitch standard to 440cps and "rescale" appropriately, keeping all
>tensions within the "original scale" plan. As I have done a lot of this sort
>of things over the past 28 years, I will be happy to counsel anyone who is
>interested. Also, I do "Scaling" service.
>regards,
>Joe Garrett, Oregon
>
>
>

Regards,
Don Rose, B.Mus., A.M.U.S., A.MUS., R.M.T., R.P.T.

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