Frequency detection from a sound file
I'm not sure if this is what you want, if you just want the FFT:
import scikits.audiolab, scipyx, fs, nbits = scikits.audiolab.wavread(filename)X = scipy.fft(x)If you want the magnitude response:
import pylabXdb = 20*scipy.log10(scipy.absolute(X))f = scipy.linspace(0, fs, len(Xdb))pylab.plot(f, Xdb)pylab.show()
I think that what you need to do is a Short-time Fourier Transform(STFT). Basically, you do multiple partially overlapping FFTs and add them together for each point in time. Then you would find the peak for each point in time. I haven't done this myself, but I've looked into it some in the past and this is definitely the way to go forward.