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I have written the cepstral method to determine the pitch of a voice signal which is much simpler.
[x,fs,bits]=wavread('/home/..specify where your speech signal is located...');
%determination of cepstral coefficients
f=fft(x);
f1=abs(f);
f2=log(f1);
f3=ifft(f2);
%finding the strongest...
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