[pianotech] Modified L Scale with 5 note transition

[Ron Nossaman]

Gene Nelson wrote:
> I have read how Del Fandrich describes Z = the square root of 
> springiness multiply by inertia.
> Inertia should be a simple Newtonian mass measure - do you weigh the board?
> How do measure springiness - it could only come from the ribs - am I on 
> the right track?
> How do you get this onto spreadsheet?
> Gene

This is string scale. The board is something entirely 
different. My Z is a combination of Conklin's characteristic 
impedance formula, with a kinetic motion formula sort of 
averaged in. Jim Hays' formula from "A Guide to Restringing" 
is a good one too. Whatever you use, the numbers aren't 
representative of anything absolute, but the curve produced 
should be a decent indication of what you'll hear in the 
scale. It's a guide, most valuable at the scale transitions to 
indicate how much the perceived volume level will change going 
from monochord, to bichord, to plain strings. Then you have to 
build a board that won't muck up your scale.
Ron N