Re: FFT class or routines

Sorry Maarten, I'm a caveman when it comes to the FFT. I need either code or advice that will simplfy things for me. The problem I'm having is with piecing each window back together into a continuous audio stream so that there are no phase conflicts.

Any suggestions?
Andrew


Maarten Wiltink wrote: 
"MeMyselfAndI" <agp001@xxxxxxxxxxxxxxx> wrote in message
news:433ab0bf$0$6112$afc38c87@xxxxxxxxxxxxxxxxxxxxxxx


I want to do an FFT analysis of audio data in a professional
music production  app. I've been trying to use a class called
RealFFT, but I don't have the  technical knowhow to peice the
audio back together after the IFFT. I was  wondering if there
is some Delphi code of some component out there which will
make it easy to get the frequency info and then convert that
back into PCM.



The Fourier Transform is its own inverse, except for a constant
factor of 2*pi IIRC. And it's common to multiply by the square
root of that to _make_ it its own inverse exactly.

Groetjes,
Maarten Wiltink


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