Re: FFT class or routines

Marc Rohloff wrote: 
MeMyselfAndI wrote:

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.



What are you trying to do after doing a FFT transform? You don't
normally use these results to play over the sound card but to display
in some other form, such as an Eq type display.

--
Marc

I'm creating an app that does frequency analysis, applies effects based on the frequency domain, and then recreates the time domain data based on the altered frequency data. So, yes I need to display info, and then I need to change it, and reassemble it from each window that IFFT gives me. Its reassembly where I'm completely stumped - ie: phase conflicts, amplitude changes where windows overlap.
Frankly, all things considered, I don't know enough about FFT. The book I read was long winded & yet thin on facts on this subject. Does anyone have a useful (and easy to understand) book title or online resource they can point me to?

- Andrew
.

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