[PD] audio analyze ideas ?

[Iain Mott]

Fft would be useful – mapping the amplitude of bands of frequencies to
whatever (perhaps you’re doing this). You could also measure the centroid,
which correlates to a brightness measure of the sound. From the centroid you
can also determine the “bigness” of sound ie. how “full” it sounds at a
given moment. – I’ll look thru some of my code and forward the maths – its
simple but I can’t remember this early in the morning – and it shouldn’t be
too hard to write as a patch (and not in C). You could also determine the
“segmentation” of the sound using env~ ie. finding out where phrases begin
and end, the length of phrases etc. Think someone out there has written a
rhythm estimator patch or external which could be handy.

Cheers, iain


-----Original Message-----
From: Andre Schmidt [mailto:andre at vju.info]
Sent: Saturday, 11 May 2002 8:51 AM
To: PD-LiST
Subject: [PD] audio analyze ideas ?

hi,

i'm making an audio 2 visual patch and was wondering if any1 has any ideas
what i could analyze on audio to be visualized. @ the moment i got:

- the frequency of loudest freguenzy
- volume
- L/R balance

and ofcourse  fiddle~ & bonk~

(for the 1st use i'm only analyzing guitar/voice)

thnx
-andre


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