Re: Intermediate representation for music analysis

["Richard F. Lyon" <DickLyon@xxxxxxx>]

Ilya,

The analysis of musical pitch is sometimes done with autocorrelation 
techniques at the outputs of the filterbank.  In such systems, one to 
two filters per critical band is plenty.

There have also been systems using a narrowband filterbank approach 
with many channels, one or more per semitone, but I don't have 
references to any handy right now.

Dick


At 5:56 AM +0300 7/16/06, Ilya Sedelnikov wrote:
> Dear list,
>
> Does someone aware of works that use filterbanks with more than a couple of
> dosens filters as a front-end for the music analysis ?
>
> Human ear is able to distinguish pitch differences at least twice less than a
> semitone which implies that for the analysis of musical piece that spans 4
> octaves the number of filters should be of the order of couple hundreds.
> Nevertheless front-ends commonly used for music analysis usually use not more
> than couple of dosens of filters (Fourier bins), sometimes even
> non-logarithmically spaced.
>
> I will be glad to hear any opinions on the subject.
> Ilya
>
>
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