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tuning-math

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  • Members: 191
  • Category: Mathematics
  • Founded: May 21, 2001
  • Language: English
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Badness with gentle rolloff   Message List  
Reply Message #1853 of 20696 |
Re: Badness with gentle rolloff

--- In tuning-math@y..., "paulerlich" <paul@s...> wrote:

> My (incomplete) understanding is that flatness is flatness. It's
what
> you acheive when you hit the critical exponent. The "logarithmic"
> character that we see is simply a by-product of the criticality.
>
> I look forward to a fuller and more accurate reply from Gene.

When you measure the size of an et n by log(n), and are at the
critical exponent, the ets less than a certain fixed badness are
evenly distributed on average; if you plotted numbers of ets less
than the limit up to n versus log(n), it should be a rough line. If
you go over the critical exponent, you should get a finite list. If
you go under, it is weighted in favor of large ets, in terms of the
log of the size.




Thu Dec 13, 2001 4:38 am

genewardsmith
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Message #1853 of 20696 |
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... the ... gonna ... a ... interest ... My (incomplete) understanding is that flatness is flatness. It's what you acheive when you hit the critical exponent....
paulerlich Offline Send Email Dec 12, 2001
10:44 pm

... what ... When you measure the size of an et n by log(n), and are at the critical exponent, the ets less than a certain fixed badness are evenly distributed...
genewardsmith Offline Send Email Dec 13, 2001
4:38 am

... This is only true if you choose a very low value for your "certain fixed badness", right? ... What if you used n instead of log(n)? Would there still be...
paulerlich Offline Send Email Dec 13, 2001
4:51 am

... Or start a bit away from 0. ... same ... This is what I was talking about in a previous posting; if we look at ... condition that |h(q)-n*log2(q)|^3 <...
genewardsmith Offline Send Email Dec 13, 2001
6:45 pm

... the ... at ... a ... = ... of ... me ... But it's not really unique as a critical asymptotic function (?), is it?...
paulerlich Offline Send Email Dec 13, 2001
6:50 pm

... is ... It is among functions n^e, for some fixed e; the value e=-1 is the critical exponent where n^(e+1)/(e+1) no longer works as an antiderivative, and...
genewardsmith Offline Send Email Dec 13, 2001
7:04 pm

... like ... more ... It should be noted that these work only "almost always", whereas 1/n works without exception, giving us an infinite set. It is highly ...
genewardsmith Offline Send Email Dec 13, 2001
7:11 pm

In-Reply-To: <9v741u+62fl@eGroups.com> ... A sharp cutoff won't be what most people want. For example, in looking for an 11-limit temperament I might have...
graham@...
x31eq Online Now Send Email
Dec 12, 2001
10:47 am

... It ... will ... looking ... want more ... keyboard ... that scale ... pleased if ... 22, ... That's why I suggested that we place our sharp cutoffs where...
paulerlich Offline Send Email Dec 12, 2001
9:12 pm

... Wow- how did that happen? One heckuva switch from the last post I can find in this thread. Not that I understand what any of this is about. Badness?? ...
clumma Offline Send Email Dec 12, 2001
8:20 pm

... The "badness" of a linear temperament is a function of two components -- how many generators it takes to get the consonant intervals, and how large the...
paulerlich Offline Send Email Dec 12, 2001
11:11 pm

... Hey. I had a coupla days to cool off. :-) I'm only saying its a starting point and I probably should have written "I now understand that Gene's flat...
dkeenanuqnetau Offline Send Email Dec 12, 2001
11:34 pm

... the ... that ... The exponent would be 4/3, not 2, for ETs....
paulerlich Offline Send Email Dec 12, 2001
11:56 pm

... more ... Hey Paul, that's what I had originally but see what Gene wrote in http://groups.yahoo.com/group/tuning-math/message/1833 But as far as I can tell,...
dkeenanuqnetau Offline Send Email Dec 13, 2001
12:09 am

... He was talking about linear temperaments there, not ETs (right, Gene?). ... That's "flat" for all ETs overall (though the wiggles aren't), but what we...
paulerlich Offline Send Email Dec 13, 2001
1:59 am

... Well the size of wiggles and the best in each range look pretty damn flat to me for steps * cents (and not for steps^(4/3)*cents or steps^2*cents). Take a...
dkeenanuqnetau Offline Send Email Dec 13, 2001
2:17 am

... but ... for ... their ... damn ... Dave, you have to plot "goodness", not "badness"....
paulerlich Offline Send Email Dec 13, 2001
3:23 am

... Paul, I assume goodness = 1/badness? How could any reasonable transformation from badness to goodness change whether it looks flat or not? I've added...
dkeenanuqnetau Offline Send Email Dec 13, 2001
5:45 am

... flat ... You'll be looking at the opposite extremes of the graph. ... easily. ... the ... Not really. At 612, you can't really see the difference yet. Go...
paulerlich Offline Send Email Dec 13, 2001
12:05 pm

I wrote, ... much ... Well I extended the graph out to 32768, and 4/3 starts to make more sense as an exponent. But I noticed something else -- something...
paulerlich Offline Send Email Dec 13, 2001
3:28 pm

I wrote, ... about ... within ... Take a look at the two pictures in http://groups.yahoo.com/group/tuning-math/files/Paul/ (I didn't enforce consistency, but...
paulerlich Offline Send Email Dec 13, 2001
4:02 pm

In-Reply-To: <9vaje4+gncf@eGroups.com> ... I don't know either, but I'll register an interest in finding out. I've thought for a while that the set of...
graham@...
x31eq Online Now Send Email
Dec 13, 2001
4:25 pm

... I've ... properties ... Well, this pattern I found shows up regardless of whether you look at consistent ETs only, or fail to enforce consistency at all. ...
paulerlich Offline Send Email Dec 13, 2001
4:40 pm

Furthermore, noting a striking symmetry centered just above 50,000, I surmised that there must be an especially exceptional ET just above 100,000. And in fact...
paulerlich Offline Send Email Dec 13, 2001
6:55 pm

... 1664 is 128*13. So 103169 is 13*256*31. Interesting, don't know if it's meaningful, that it's lots of 2s and two prime numbers. The obvious reason for...
graham@...
x31eq Online Now Send Email
Dec 13, 2001
8:32 pm

... suggest ... survey? ... No, but 103168 is. 103169 is 11*83*113. ... obvious ... from ... equal is ... Confused . . . you mean 2*103168-equal? That's not...
paulerlich Offline Send Email Dec 13, 2001
8:44 pm

... about ... within ... This partly makes sense to me and partly doesn't; it should have wave frequencies corresponding to the good 7-limit ets, but why 1680?...
genewardsmith Offline Send Email Dec 13, 2001
6:52 pm

... wave ... Matlab has fft. The FFT of the set of results up to 2^17 has a few extremely sharp peaks. With what formula should I interpret the results?...
paulerlich Offline Send Email Dec 13, 2001
7:10 pm

... I don't know what that means, but where are the spikes?...
genewardsmith Offline Send Email Dec 13, 2001
7:12 pm

... few ... I figured out how to get the power spectrum. Result: one big giant spike right at 1665-1666. I will upload the graph shortly....
paulerlich Offline Send Email Dec 13, 2001
7:23 pm
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