Howdy.

I need to do some Fast Fourier Transforms for an audio project I’m

working on. Problem is I don’t know shit about math

Reading a dozen online tutorials on FFT tells me that the FFT of a

vector of real time domain data of size N should yield a vector of

frequency domain data of size N/2.

So I try out the different FFT functions in GSL, but the ones that

accept a vector of real data of size N also return a vector of size N.

What’s the deal here?