[LAD] FFT 1D real

Fons Adriaensen fons at linuxaudio.org
Mon Mar 14 21:21:24 UTC 2011

On Mon, Mar 14, 2011 at 09:50:34PM +0200, Alfs Kurmis wrote:

>  What is good/best way to calculate values for visual 10-20 hopping
>  bars like in GUI audio players ?

Use a set of filters to split the signal and then measure 
each of the outputs.

> >    Use an FFT operating on real data instead of complex.
>   Can U gimme pointers to such functions ?

I just use FFTW3. If you can't do that because you have to
write it yourself, then you have to write it yourself. It's
not so difficult once you understand the theory. And there
must be examples on the web.



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