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Re: Can a timbre affected by a shifted virtual pitch evoked by double-spaced harmonics?
On Tue, 25 Feb 2003 03:47:43 +1100, Matt Flax <flatmax@IEEE.ORG> worte:
>On Sat, Feb 22, 2003 at 04:31:10PM +0800, Chen-gia TSAI wrote:
>> This success of autocorrelation in modeling pitch extraction is, at
>> least for me, very impressive. I also noticed that the autocorrelation
>> function has been used to analyze musical timbres in
>Autocorrelation dates back to an article by Licklider (1951 in
>Experientia). The concept that autocorrelation correctly models the
>complex neural processing which is anatomically present in the inner ear
>is a big question mark in my opinion. The beginning of my views can be
>found here (this is only a place model- a temporal model is in the pipe
Just to understand the nomenclature here, by "autocorrelation" do we
mean autocorrelation of the pressure signal waveform? There are two types
that are used for pitch detection that I know of, multiplicative and
subtractive. Here is a nice review of these types:
Alain de Cheveigne, "YIN, a fundamental frequency estimator for speech
and music", JASA 111(4), 1917-1930 (April 2002).
de Cheveigne developed a refinement of the subtractive method which seems
to be very accuracte for speech and solo music. However, I don't think
it has been tested on inharmonic signals, like the ones Chen-Gia gives.
University of Illinois at Urbana-Champaign