Hi, On Tue, 2008-02-12 at 13:45 -0800, punchik punchik wrote: > ive heard a lot of times that natural sounds has more > spectral richness that digital generated sounds... > is it possible to measure the spectral richness of a > sound?
There isn't a standard metric for 'richness' as far as I know. However, you might be able to break down the 'richness' percept into a number of features that can be measured. Things that spring to mind as contributing to perceived richness are: - The number of measured partials - The 'inharmonicity' of the spectrum (i.e. its divergence from a purely harmonic signal) - The 'spectral flux' the amount of variation (transience) in the spectrum between frames You could try to find a mathematical relationship between these factors that corresponds to the richness percept, or you could use some kind of classifier which you would 'train' to relate a given richness input vector (npartials, inharmonicity, flux) with a perceptually determined output measure of richness. One of the simplest classifiers for this is the k-NN classifier. Jamie -- www.postlude.co.uk _______________________________________________ [email protected] mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
