Re: Can a timbre affected by a shifted virtual pitch evoked by (beauchamp james w )

Subject: Re: Can a timbre affected by a shifted virtual pitch evoked by
From:    beauchamp james w  <j-beauch(at)UX1.CSO.UIUC.EDU>
Date:    Mon, 24 Feb 2003 15:27:02 -0600

On Tue, 25 Feb 2003 03:47:43 +1100, Matt Flax <flatmax(at)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 >...SNIP... >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 >line): 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. Jim Beauchamp University of Illinois at Urbana-Champaign j-beauch(at)

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