[PD] making a perceptual spectrum analyzer

[William Brent]

I've got a couple externs in my timbre analysis set that do bark- and
mel-frequency cepstrum.  You can set the spacing of the filterbank in
barks, for instance.  I was thinking about making externs for plain
bark spectrum rather than cepstrum too, which might be exactly what
you're looking for.

You can download the source and mac binaries on this part of my site.
It's the third item down the page:
http://williambrent.conflations.com/pages/research.html


Let me know if that helps,
William



On Sun, Oct 11, 2009 at 12:26 PM, mescalinum at gmail.com
<mescalinum at gmail.com> wrote:
> how to make a perceptual spectrum analyzer?
>
> the magnitude output of rfft~ seems to need some tweaking, like:
> 1) correcting amplitude of bins
> 2) spacing the bins from equally linearly spaced to equally logarithmic
> spaced (for outputting a set of frequencies like: 62 125 250 500 1000
> 2000 4000 8000 16000)
>
> does anyone already did it?
> in part 2), apart I don't know how to do it, I'm not sure if I need to
> sum up all the bins belonging to a frequency band, or to average them ...?
>
>
> ~
>
>
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-- 
William Brent
www.williambrent.com

“Great minds flock together”
Conflations: conversational idiom for the 21st century

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