Erv Wilson and Jeniffer Stapher has asked me to circulate this notice about the Microtone Conference in El Paso this November. --John Subject: RE: Please Reply...
John Chalmers
JHCHALMERS@...
Jul 12, 2001 9:20 pm
456
Any insights on the higher-D Farey series stuff? I'm sure such a thing won't be forgotten, but I thought I'd stoke the coals... -Carl...
carl@...
Aug 4, 2001 5:25 pm
457
I still need to post "Eureka, part 2" . . . but really, I'm pretty sure we won't need to define mediants . . . I expect that the validation exercise for the...
Paul H. Erlich
PERLICH@...
Aug 6, 2001 5:48 pm
458
... This raises a point that hasn't been discussed much: where exactly do(es) the mechanism(s) responsible for tonalness sit? On top of both the place and...
carl@...
Aug 11, 2001 5:49 pm
459
... You mean, you'll test Tenney dissonance against the voronoi cell approach? Processor intensive, eh? Time to consider distributed computing again? I've...
carl@...
Aug 11, 2001 5:52 pm
460
... We don't know much about periodicity mechanisms, but we do know that virtual pitch is a _central_ process, since experiments which distribute the ...
Paul H. Erlich
PERLICH@...
Aug 13, 2001 7:02 pm
461
... No, the validation exercise would simply check that the total "probability" (i.e., the sum of the products of bell curve height times cuberoot(a*b*c)) is...
Paul H. Erlich
PERLICH@...
Aug 13, 2001 7:05 pm
462
... Right... ... Fantastic how cutting-edge the whole subject is. ... I meant any frequency. I didn't realize (or remember) that virtual pitch works on...
carl@...
Aug 13, 2001 11:08 pm
463
... I thought you were claiming that periodicity only works up to 4KHz. If this is so, it's the (possibly missing) _fundamental_, not the partials, that must...
Paul H. Erlich
PERLICH@...
Aug 13, 2001 11:10 pm
464
... Can you give an example? -Carl...
carl@...
Aug 13, 2001 11:14 pm
465
Did you follow the validation exercise I did for the dyad case, using sqrt(n*d) as the approximation for width? ... From: carl@......
Paul H. Erlich
PERLICH@...
Aug 13, 2001 11:17 pm
466
... I was. My understanding based on past threads (way past...) was that neurons can fire up to about 1000 hz., and gang together (in groups of four?) to...
carl@...
Aug 13, 2001 11:31 pm
467
... Maybe, but that's not what I'm saying. I don't even want to assume that virtual pitch is a distinct phenomenon from periodicity pitch. What I'm saying is...
Paul H. Erlich
PERLICH@...
Aug 13, 2001 11:37 pm
468
... Is that to say you know of nobody actually measuring pulses on an EEG at a frequency where there was no acoustic energy? ... Um. I thought those two terms...
carl@...
Aug 14, 2001 12:47 am
469
... I wouldn't be surprised, but no, I don't know of a specific case of this. ... Well you're putting them in different boxes in your diagram . . . if you ...
Paul H. Erlich
PERLICH@...
Aug 14, 2001 12:50 am
470
... So if the ?'s are deleted, I still don't understand why a virtual fundamental couldn't be rendered above 4K (since the virtual pitch mechanism is getting...
carl@...
Aug 14, 2001 12:52 am
471
... Yes, in fact, I believe it was a comment from me that suggested it. I know what you want to do now. Dont understand the (verbal) equation you gave yet,...
carl@...
Aug 14, 2001 12:54 am
472
It's the same as the dyad case, except now in the triad case, the approximation will be cuberoot(a*b*c) instead of sqrt(n*d). Got it? ... From: carl@......
Paul H. Erlich
PERLICH@...
Aug 14, 2001 12:58 am
473
I don't think the periodicity mechanism necessarily gets its frequencies from the place mechanism anyway!...
Paul H. Erlich
PERLICH@...
Aug 14, 2001 1:00 am
474
I find it very unlikely that frequency of sound is encoded anywhere in the brain as frequency of neural firing except below about 40 Hz. Is there evidence? --...
David C Keenan
D.KEENAN@...
Aug 14, 2001 1:00 am
475
When a noise signal is added to a few-ms delayed version of itself, one hears a pitch corresponding to the inverse of the delay time, even though there is no...
Paul H. Erlich
PERLICH@...
Aug 14, 2001 1:02 am
476
... I've been distinguishing between "periodicity pitch" (which I take to be the a sound people claim to hear in certain circumstances, and which is created by...
carl@...
Aug 14, 2001 2:16 am
477
... We may or may not have such a periodicity mechanism. If we do, as it seems we do, it seems likely that virual pitch is a result of it, though as far as I...
Paul H. Erlich
PERLICH@...
Aug 14, 2001 2:23 am
478
... Wow. ... Tricky topic. Can we say that harmonic entropy calculations are defined on all of the partials coming in, and that our usual way of inputting ...
carl@...
Aug 14, 2001 2:29 am
479
... Yes, I think so. Let's run it! -Carl...
carl@...
Aug 14, 2001 2:31 am
480
... Yes. But it should be an extremely good approximation if all of the tones have harmonic partials, and similar spectra. Think about it. The only effect ...
Paul H. Erlich
PERLICH@...
Aug 14, 2001 2:32 am
481
... So? I don't see that as evidence of frequency encoded as frequency (or time encoded as time) in the brain. Just because you can imagine no other way, ...
David C Keenan
D.KEENAN@...
Aug 14, 2001 2:40 am
482
Sorry Dave -- I read your question too quickly. My understanding is that higher frequencies _are_ encoded as frequency of neural firing, only most of the...
Paul H. Erlich
PERLICH@...
Aug 14, 2001 2:43 am
483
... Oh, I totally agree... ... Really? I don't follow that. -Carl...
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