[CAUT] Re. Link to Young Paper

[David Brown]

Dear Fred-

I wonder if you could expand on this a bit more. I attempted to calculate
FAC this way after reading your post but I must have done something wrong.
The difference between the first and fourth partial of A4 seemed to yield a
wider octave ( larger A number, to be expected I suppose) than the normal
reading,  but the difference between the first and fourth partial of C 6
yielded numbers well into the 20¹s or 30¹s! I tried the the difference
between the first and second partial of C7 as well and still no real usable
numbers for me. There must be a way to enlighten me!


Hope all is well in New Mexico.

Regards-

David

> [CAUT] Re. Link to Young Paper
> Fred Sturm  fssturm at unm.edu
> Thu Jan 18 11:04:02 MST 2007
>
>         I don't think they occur only on bass strings. Plain wires can also
> have anomalies, as I discovered when I first started tuning with an
> SAT a little over ten years ago. I found that results were "odd"
> often enough that I looked into it a bit. SAT relies on the
> discrepancy between two partials to predict a virtual partial ladder.
> I found that I could get a better calculated FAC tuning if I measured
> the distance between the A4 and A6 partials of A4, and between C6 and
> C8 partials of C6 (as opposed to A5 and A6 partial of A4, C6 and C7
> partial of C6), and extrapolated a result. The distance between 1st
> and 4th partial seemed to "average out" the anomalies in the
> measurement between 2nd and 4th, 1st and 2nd, and yield a result that
> calculated better tuning spreadsheets.
>
> 
> Regards,
> Fred Sturm
> University of New Mexico
> fssturm at unm.edu
> 
> 
> 
> 
David C. Brown                                          Office -
1-480-965-6760
Piano Technician   
david.c.brown.2 at asu.edu
School of Music                                           Cell-
1-480-751-7715
Arizona State University


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