Z Formula

[Terry Neely]

I'm sorry to intrude, and even more so to admit ignorance, but this thread is
the first time I have heard of the Z formuls. What is it, and where can I
reference it for study?
                                                                    Thanks in
advance,
                                                                    Terry Neely,
North Carolina

Joseph Garrett wrote:

> JD,
> I have been using the "Z" formula as criteria for scale evaluation, for many
> years. I have found that the graphing of this makes my rebuilds have a
> smoother transition throughout the compass of the piano. I have many scales
> on disk file that show the process. These are extensive and would be
> overburdening to the list, if I posted them. If I were to send them to you
> via snail mail, the cost would be enormous, as each envelope would weigh in
> at about a pound. So, having said this, I hope that you will avail yourself
> of the possibility that the Z formula does have some merit and try it, by
> using your previous scales records and re-run them using the original scale,
> (with the Z formula), and then a comparative with your "end" scale, (also
> using the Z formula). When you look at the graphs you will probably find
> that you have, intuitively been doing much the same, but without the math
> aid of the Z formula. Of course, this is speculation on my part, but I
> suspect, through trial and error, you have become intuitive in this regard.
> Joe Garrett, RPT, (Oregon)
> P.S. If you do not have a computer program, available, with the Z formula, I
> would be happy to send you an olde one. We are currently revising the
> program "Scale Master" from a DOS to Windows program. The one I have
> available to offer you is a DOS version.