I am reading a .wav file and I have been able to plot it. I am now trying to perform a FFT on two of the three channels; I am trying but I keep getting 'Undefined function 'fft' for input arguments of type 'int16' '.

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Oliver Bunn
Oliver Bunn on 13 Oct 2016
Commented: Oliver Bunn on 13 Oct 2016
Firstly what code would you use to perform the fft? Secondly how do I get rid of this Error?

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Accepted Answer

KSSV
KSSV on 13 Oct 2016
Convert int16 data to double using double()
fft needs data to be in double.
data = double(data) ;

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