[CAUT] pre-stretching new string Wet vs Dry Soundboard

[Richard Brekne]

Hi Mike, Andrew... whomever...

I am not sure I understand whats being said here.  If a string is 
vibrates at a given frequency, how does the degree of stiffness of the 
board significantly alter this pitch ? Anyone care to explain the 
mechanism for this ?

Cheers
RicB


        I think Mike may be on to something here.

        Has anyone looked into the relative "stiffness" of wood assemblies
        under different MCs?

        Andrew Anderson


    At 02:38 PM 6/8/2007, you wrote:
     >REVELATION:
     >   We tune by listening only to the OUTPUT pitches of the soundboard
     >resulting from the INPUT forces of the strings.  If the INPUT of
    the strings
     >stays constant, but the board changed in stiffness due to
    humidity, the
     >OUTPUT pitches would be different with the same INPUT.  SO WE
    CHANGE THE
     >TENSION ON THE STRINGS OR THE INPUT TO GET WHAT WE WANT.  This
    would explain
     >how giant pitch swings can occur without any corresponding major
    change in
     >string length, tension, bridge position, or changes in crown.
     >   I doubt one could tune a piano by adjusting wire tensions to
     >pre-calculated theoretical amounts without listening to the
    pitches and
     >achieve any reasonable result.
     >
     >-Mike Jorgensen----I'm outa here for a week now.