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36:45:60:80   Message List  
Reply | Forward Message #1037 of 1055 |
Re: 36:45:60:80


Kelly,

--- In harmonic_entropy@yahoogroups.com, "traktus5" wrote:
[snip]
> By 'height', I was referring to how, for example, the major third
> in the chord c-e-a is 12:15, whereas it's "height" in the chord
> d4-f#4-b4-e5 (spelled one way) is 36:45. So, I still consider that
> the first major third has a height, in a manner of speaking of 3
> (though I realize 3/3 = 1), and the height of the second third is
> 9, in a manner of speaking.

What you call "height" would seem to be what
mathematicians call "Greatest Common Divisor"
or "GCD".


> You have to admit that, according to Paul's theories, the height
> of a chord in a series is related to its harmonic entropy, ...

??? I don't think I can admit what I don't understand ...!


> so I'm just trying to 'tabulate' the 'heights of the intervals.
> How would you do it?
>
> thanks, Kelly
>
> > Hi Kelly,
> >
> > --- In harmonic_entropy@yahoogroups.com, "traktus5" wrote:
> > >
> > >
> > > > > > Do you think this could have any acoustical significance?
> > > > > > It's a very nice sounding chord!
> > >
> > > > > ... no, I don't think it guarantees an overall
> > > > > "nice" sound.
> > >
> > > But there is a correlation between the 'height' of the
> > > interval in the series (ie, eg, 5/4 x 3 = 15/12) and
> > > the difference tone, so there could be a connection...
> >
> >
> > You do *very* strange arithmetic! ;-)
> >
> > You often write things like:
> > 5/4 x 3 = 15/12
> >
> > This should be, instead,
> > 5/4 x 3/3 = 15/12
> >
> > since
> > a) you can always multiply any number by 1 without
> > changing it, and
> > b) 2/2 = 3/3 = 4/4 = 5/5 = ... = 1 = n/n for every
> > natural number n.
> >
> > These facts mean you cna legitimately multiply BOTH
> > top and bottom (numerator and denominator) of any
> > fraction by the same number.
> >
> > Enough of the maths ... what do you mean by "height"?

Regards,
Yahya







Thu Jul 6, 2006 2:42 pm

yahya_melb
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Message #1037 of 1055 |
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hi Paul (for when you come back), or others. I can't locate the old thread, but thanks for suggesting the above spelling for the chord d4- f#-b4-E5. I don't...
traktus5
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Jun 20, 2006
5:53 pm

Hi Kelly, ... Exactly! ;-) ... The tetrad am : bm : cn : dn has the property that dn/am = n/m if and only if a = d. (Here juxtaposition means multiplication:...
yahya_melb
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Jun 22, 2006
2:23 am

Hi Yahya ... Hmmm...I'm not sure if I would include the latter two chords in the same category as the one I cited. And 4:6:7:14 has an octave in it, which may...
traktus5
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Jun 26, 2006
9:01 pm

... But there is a correlation between the 'height' of the interval in the series (ie, eg, 5/4 x 3 = 15/12) and the difference tone, so there could be a...
traktus5
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Jun 27, 2006
11:24 pm

Hi Kelly, ... You do *very* strange arithmetic! ;-) You often write things like: 5/4 x 3 = 15/12 This should be, instead, 5/4 x 3/3 = 15/12 since a) you can...
yahya_melb
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Jul 2, 2006
8:03 am

... hi Yahya - thanks for the math correction. I'm terrible at it, though love numbers... By 'height', I was referring to how, for example, the major third in...
traktus5
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Jul 5, 2006
4:16 pm

Kelly, ... [snip] ... What you call "height" would seem to be what mathematicians call "Greatest Common Divisor" or "GCD". ... Regards, Yahya...
yahya_melb
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Jul 6, 2006
2:51 pm

Hi again Kelly, ... [snip] ... Errata: in the above, I should have written: 45/36 = (5 x 9) / (4 x 9) = 5/4 80/60 = (4 x 20) / (3 x 20) = 4/3 80/36 = (4 x 20)...
yahya_melb
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Jul 2, 2006
8:19 am

... Hi Yayha, ... Sorry. You guys really keep me on my toes. I just chose very small ... Personally, I find the interval of a major seventh more consonant...
traktus5
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Jul 5, 2006
4:23 pm

Kelly, ... [snip] ... There might be; I don't know. ... Regards, Yahya...
yahya_melb
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Jul 6, 2006
2:55 pm
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