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Mad Gene - about that science...   Message List  
Reply | Forward Message #51221 of 85218 |
Re: Temperament agreement

--- In tuning@yahoogroups.com, "wallyesterpaulrus" <paul@s...> wrote:

> I indicated epimericity with the sizes of the numbers in the ratios,
> in case you didn't know that. My brain is tired -- if you can express
> epimericity in terms of the quantities on the x- and y-axes, I can
> probably show contours for it.

If u = log2(n) and v = log2(d), then the x and y axes of your graph show

x = u + v
y = (u+v)/(u-v)

Solving for u and v in terms of x and y gives

u = (x + xy)/2
v = (x - xy)/2

This now gives us

n = 2^u = 2^((x + xy)/2)
d = 2^v = 2^((x - xy)/2)

From this, e = log2(n-d)/log2(d) would be

e = (2/x(y-1) log2(n-d)

which is a function of x and y. Fixing an e, you can find y in terms
of x by Newton's method.




Thu Jan 8, 2004 2:54 am

genewardsmith
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Message #51221 of 85218 |
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... I indicated epimericity with the sizes of the numbers in the ratios, in case you didn't know that. My brain is tired -- if you can express epimericity in...
wallyesterpaulrus
wallyesterpa...
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Jan 8, 2004
2:34 am

... If u = log2(n) and v = log2(d), then the x and y axes of your graph show x = u + v y = (u+v)/(u-v) Solving for u and v in terms of x and y gives u = (x +...
Gene Ward Smith
genewardsmith
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Jan 8, 2004
2:54 am

... ratios, ... express ... can ... show ... There seems to be a parethesis missing, and . . . ... and n and d? No good....
wallyesterpaulrus
wallyesterpa...
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Jan 8, 2004
3:27 am

... y = (u-v)/(u+v) ... (2/(x*(y-1))) * log2(n-d) ... Yes good. I expressed them as functions of x and y, after all n(x, y) = 2^((x + xy)/2) d(x, y) = 2^((x -...
Gene Ward Smith
genewardsmith
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Jan 8, 2004
3:51 am

... You mean (2/(x*(y-1))) log2(n(x,y) - d(x,y)), right? I did that and the signs seem wrong . . . I then extended the contours into negative values and at...
wallyesterpaulrus
wallyesterpa...
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Jan 8, 2004
4:47 am

... Whoops--I'm having problems looking at things sideways, I guess. Should be x = u + v y = (u-v)/(u+v) However I used the right values for y in when I solved...
Gene Ward Smith
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Jan 8, 2004
3:45 am

... I think they are not only poetic, but mnemonic and nice&short - additionally - for some of them, somehow appropriate. ... and before I even get done with...
czhang23@...
hanuman_zhang
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Jan 8, 2004
6:31 pm

... my former classmates! ... That's the spirit. And (off topic) I, an avid reader of Scientific American, had to wait 6 months for that freakin' rag Discover...
wallyesterpaulrus
wallyesterpa...
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Jan 8, 2004
8:23 pm

... At first meeting of the TLA (Tuning List Anon): Hi my name is ____ and I am a microtonal list addict. So baaadly to the point I forgot the music... ... ...
czhang23@...
hanuman_zhang
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Jan 12, 2004
8:55 am

... http://groups.yahoo.com/group/tuning/message/51623 ... baaadly to the ... ***Heh, heh... that's been a consistent accusation... :) JP...
Joseph Pehrson
jpehrson2
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Jan 13, 2004
4:20 am

... scientist worth his salt... I once got arrested for it, too...Imagine now what could and can happen to a crazy Asian male "armed" with drumsticks and...
czhang23@...
hanuman_zhang
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Jan 13, 2004
1:29 pm

... Straight out of Vineland. No exhaggeration on your part? -Kurt...
Kurt Bigler
voxdig
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Jan 14, 2004
10:56 am

... these peculiar times... & luckily I only got psych monitoring/probation for 5 yrs (5 yrs max w/o parole in the Huntsville Hole otherwise... skipped outta...
czhang23@...
hanuman_zhang
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Jan 14, 2004
7:39 pm

... Sorry I hadn't caught up. ... I'm afraid I find these difficult to read because I don't know very many LTs by their vanishing commas, but rather by their...
Dave Keenan
dkeenanuqnetau
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Jan 8, 2004
4:10 am

... gradually ... with ... because ... blue 'badness ... and ... data ... Because they agree exactly, for the Tenney-weighted minimax over *all* intervals!!...
wallyesterpaulrus
wallyesterpa...
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Jan 8, 2004
4:30 am

... If my analysis on tuning-math is correct it doesn't depend on the commas, just on the temperament, and should work fine....
Gene Ward Smith
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Jan 8, 2004
7:37 am

... I don't see what distinction you're trying to make. By "bicomma" I meant a wedgie of any pair of commas forming a basis for the kernel of the temperament,...
wallyesterpaulrus
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Jan 8, 2004
7:59 am

On Thu, 08 Jan 2004 04:10:17 -0000, "Dave Keenan" <d.keenan@...> ... I wouldn't put too much effort into trying to accommodate Orwell (I prefer the...
Herman Miller
teamousechan...
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Jan 9, 2004
5:13 am

... Could you (and Dave) give a list of desired commas?...
Gene Ward Smith
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Jan 9, 2004
5:53 am

On Fri, 09 Jan 2004 05:53:36 -0000, "Gene Ward Smith" <gwsmith@...> ... I'm pretty much in agreement with Paul's original list, with the addition of the...
Herman Miller
teamousechan...
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Jan 10, 2004
3:55 am

... http://groups.yahoo.com/group/tuning/message/51208 ... Gene, ... disagreement ... things ... with ... faith ... we're ... this ... to ... both ... agree ...
Joseph Pehrson
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Jan 8, 2004
3:32 am

... made of >them (if at all) by using purpose-built extremely inharmonic timbres. [. . .] ... Big favs with me - recently I have been "collecting" tons of...
czhang23@...
hanuman_zhang
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Jan 8, 2004
1:41 pm

... I thought at the time it was better to write something up instead of spending all that time deciding which temperaments should be listed or not. And the...
Graham Breed
x31eq
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Jan 8, 2004
5:18 pm

... choice ... possibly ... the ... by the ... position. ... How about teaching a man how to fish *and* giving him trout plus 12 or so other kinds of fish?...
wallyesterpaulrus
wallyesterpa...
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Jan 8, 2004
8:16 pm

... Yes, but the poor man's been waiting for a couple of years now and he still doesn't have either! Whereas he's had plenty of opportunities to further his...
Graham Breed
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Jan 8, 2004
9:30 pm

... Paul's 5-limit database constitutes 5-limit fish, with a little explanatory stuff that's mostly been written. The teaching-how-to-fish, however, is...
Carl Lumma
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Jan 8, 2004
9:39 pm

... fish, ... What did you have in mind? ... Yes, it seems that the XH era is ending, and even 1/1 always got more circulation anyway. I'd like the co-authors...
wallyesterpaulrus
wallyesterpa...
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Jan 8, 2004
9:48 pm

... A 'for-dummies' how-to identify, search for and optimize temperaments and turn them in to scales. Definitions of epimericity, epimorphic, how to use...
Carl Lumma
clumma
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Jan 8, 2004
9:59 pm

... to- ... temperaments ... Ouch -- I think you're talking about a book, not an article. I see no reason for most of this stuff. ... published ... XH has been...
wallyesterpaulrus
wallyesterpa...
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Jan 8, 2004
10:06 pm

... Most? The Grassman Algebra primer is the only part I see as optional. And perhaps "working with matrices" would be a better title for the scope I had in...
Carl Lumma
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Jan 8, 2004
10:29 pm
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