---------------------------- Original Message ---------------------------- Subject: Re: [music-dsp] Cheap spectral centroid recipe From: "Ethan Duni" <ethan.d...@gmail.com> Date: Wed, February 17, 2016 11:21 pm To: "A discussion list for music-related DSP" <music-dsp@music.columbia.edu> -------------------------------------------------------------------------- >>It's essentially computing a frequency median, >>rather than a frequency mean as is the case >>with the derivative-power technique described >> in my original approach. > > So I'm wondering, is there any consensus on what is the best measure of > central tendency for a music signal spectrum? There's the median vs the > mean (vs trimmed means, mode, etc). But what is the right domain in the > first place: magnitude spectrum, power spectrum, log power spectrum or ??? normalized to fundamental frequency or not normalized (so that no pitch detector is needed)? �should identical waveforms at higher pitches have the same centroid parameter or a higher centroids? spectral "brightness" is a multi-dimensional perceptual parameter. �you can have two tones with the same spectral centroid (however consistent way you measure it) and sound very different if the "second moment" or "variance" is much different. � -- r b-j � � � � � � � � � r...@audioimagination.com � "Imagination is more important than knowledge."
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