May the 4ths be with you

[Richard Brekne]

Don wrote:

> Hi,
>
> Very nice graphs but do the colors coincide with the partials you are
> measuring? I guess so... but 7 plots on first graph and only 4 on 2nd??

Gee Don,  I thought it was easy enough to figure this one out. They are
well marked on the right side what they are. But ok. The first graph has
the Inharmoncity curves for the Fundementals, and partials 2,3,4,5,6,8. for
all notes C3 to C5.  And you are correct in observing that there are seven
individual curves.

The second graph, as stated in the little box on the right, combines the
8th  and 4th, the 6th and 3rd, the 4th and 2nd, and the 2nd and 1st so as
to show the beat rates of said octave types... ie 8:4, 6:3, 4:2, and 2:1.
And once again you are correct in noteing there are only 4 curves.

Think about it, I am sure you will see it at second glance.

Cheers

RicB

btw... the colours were generated by excel automatically..... presumably to
be able to easily see each curve without mixing them up. Probably not much
other significance to them. :)

Another side note.... Both Dr. Coleman and Dean Reyburn have seen these and
recognized them for what they are immediately. In fact there is a very
similiar graph (to the beat rates graph) in RCT's partial preview. I think
that shows just a few more relationships, but is quite similar in overall
tendencies.







>
>
> Regards,
> Don Rose, B.Mus., A.M.U.S., A.MUS., R.M.T., R.P.T.
>
> mailto:pianotuna@accesscomm.ca
>
> http://us.geocities.com/drpt1948/
>
> 3004 Grant Rd.
> REGINA, SK
> S4S 5G7
> 306-352-3620 or 1-888-29t-uner




--
Richard Brekne
RPT, N.P.T.F.
UiB, Bergen, Norway
mailto:rbrekne@broadpark.no
http://home.broadpark.no/~rbrekne/ricmain.html