[CAUT] pre-stretching new string?

[Richard Brekne]

You are quite wrong David.  The formula, and the approach for arriving 
by calculation at a change in pitch resulting from any given change in 
length is entirely adequate.  I already went down the road you hint at 
with several of the physics guys and gals on both lists and Galembos 
paper is where all that ended up.

As for your two different strings below... of COURSE  a similar change 
in length will affect differently two dissimilar strings that were 
originally tuned to the same pitch. What that has to do with any of this 
I am sure I dont know... but even if it did... you could still calculate 
the changes in pitch each of these would make.

Again... Calculate the change in length using trig, then the change in 
tension using Galembo.. (Hooks law actually), and then you have what you 
need to calculate resultant change in pitch for any given (unwound) 
string at any given start tension.

Cheers
RicB


    Sorry, but it's not quite a complete enough formula for purposes of this
    discussion.  When comparing two strings that produce the same pitch
    but with
    different tensions, either the original length will be different or the
    diameter will be different (or both), thus a similar change in
    length will
    yield a different change in tension and thus pitch.  

     

    David Love
    davidlovepianos at comcast.net
    www.davidlovepianos.com

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