[PD] making a perceptual spectrum analyzer
Loic Kessous
loic.kessous at gmail.com
Mon Oct 12 00:08:51 CEST 2009
well in other words, but you probably understood you can use a filter
bank and measure energy of each filter outputs using env~
maybe someone already did it...I don't know, else there are 24 bark
bands, here you can find explanation:
https://ccrma.stanford.edu/~jos/bbt/Bark_Frequency_Scale.html
loic
---
have a look if you can find some constant Q filter analyser or bar
filters, it can be a good starting point.
hope that helps
loic
On 11 oct. 09, at 21:26, 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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