Aural Pure 5ths Temperament Part III

[Jim]

Hi Glenn:

Yes, that's all there is to it. Well, almost. some pianos may require
1.5 cents to be added to the A4 number. I can't guess the inharmonicity
curve of every piano, but if 1.0 does not make the 5ths pure enough,
try 1.2 etc. It has just amazed me how simple this really is.  More and
more I'm beginning to appreciate the genius of Dr Sanderson and his
piano tuning formula.

Jim Coleman, Sr.

On Sun, 25 May 1997, Glenn wrote:

>
>
> ----------
> > From: Jim <pianotoo@IMAP2.ASU.EDU>
> > To: pianotech@byu.edu
> > Subject: Aural Pure 5ths Temperament Part III
> > Date: Saturday, May 24, 1997 11:21 PM
> >
> >
> > The original experiments were done on my Steinway L which had
> > FAC stretch numbers of 7.0, 8.5, 8.6.  By adding 1.0 cents to
> > the A4 stretch number, the center octave was stretched enough
> > to make the 5ths come out pure in almost every case. Now this
> > was at the expense of making the 4ths faster as well as the single
> > octaves. The smooth curve ability of the SAT kept the 3rds and
> > 6ths well in line, but the 10ths were a little faster, but the
> > progression was smooth for all intervals.
> >
> > Jim Coleman, Sr.
>
> So is this all you have to do to tune pure fifths with the SAT II?  Add 1.0
> cents to the A4 FAC tuning and away I go?  If there is more to it, please
> explain how to do it.
>
> Glenn.
>