>told me the oct. type (10:3, I think) but I > deleted the post. It should be 10:2 if you want to use the 10th partial. 5 :1 if you want to use the lowest partials. Below is how it figures out. Coincident partials Octave 2:1 , 4:2, 6:3, 8:4 10:5 Double octave C2 -- C4 4:1 3rd Ab4--C5 5:4 C4 is middle C 10th Ab3--C5 5:2 Ab3--C4--C5 5:4:2 <-notice 4:2 oct. Double Oct Ab2--C5 5:1 + 3rd (17th) By words, the ratio of the 3rd is 5:4. This means the 5th partial of the lower note is close to or "coincident" with the 4th partial of the upper note. The numerical difference between coincident partials gives the beat rate. If you drop the lower note one octave, making a 10th, its 5th partial (now an octave lower than before) is coincident with the second partial of the upper note. If you drop one more octave the 5th partial and first partial are coincident. If you want to use the 10th partial it would be 10:2 for Ab2--C5. For aural tuners, if the beat rate of Ab4--C5 is 12 the rate for Ab3--C5 will be 6. for Ab2--C5 the rate will be 3. ----- Original Message ----- From: Jon Page <jonpage@attbi.com> To: College and University Technicians <caut@ptg.org> Sent: Friday, November 01, 2002 5:58 AM Subject: Which Partial ? > Is there a reference to show which numerical ratio (ie: 4:2) goes with > which partial > and why a certain oct. type couldn't be used in a particular register. > > I suppose that I could figure it out if I had the partial sequence in front > of me. > I'm new to this 'tuning-by-numbers'. > > Primarily, I'm interested in a double octave and a third for the low bass > to give it > a proportion in my VT. Ron told me the oct. type (10:3, I think) but I > deleted the post. > > Jon Page > > > _______________________________________________ > caut list info: https://www.moypiano.com/resources/#archives
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