Changing Inharmonicity

[David Love]

Well that sort of begs the question.  If the piano doesn't tune as nicely
with the less than ideal numbers (8, 9.5, 6), why not tune it with the
original numbers?  Would it sound worse yet?  There have been times when I
have encountered a smallish piano with inharmonicity numbers not in a
straight line (very high F readings e.g.) that I have experimented by simply
using default setting on the SATIII (which is 8, 7, 6), make a small
modification with the DOB as necessary and plow ahead.  To be honest, the
tuning worked out pretty well.  Certainly no worse than I would have gotten
using the actual numbers--or at least so it seemed.  How important is the
8th partial (quadruple octave if I remember me partials correctly) of F3 in
the practical application of a tuning anyway.  Have others experimented with
using so called "ideal" numbers on a piano whose FAC numbers might have
shown something different?  What have you found?

David Love


----- Original Message -----
From: "Newton Hunt" <nhunt@optonline.net>
To: <pianotech@ptg.org>
Sent: October 30, 2001 12:12 PM
Subject: Re: Chaning Inharmonicity


> An optimum set of values would be a straight line, like 8, 7 and 6 or
> 7,7,7 or some such.  I like to see a straight line but C6 no higher than
> 5 but that is rare.  Now one "D" I had was 7,6,5, real nice numbers but
> it rose to 8,9.5,6 and it didn't tune quite as nicely as the previous
> numbers.