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?