Matlab for computing speech spectrogram.

[y,fs,bits] = wavread('SpeechSample.wav');
soundsc(y,fs); % Let's hear it
M = round(0.02*fs);  % 20 ms typical for speech
N = 2^nextpow2(4*M); % zero padding for interpolation
w = hamming(M);
myspectrogram(y,N,fs,w,-M/8,1,60); 
% https://ccrma.stanford.edu/~jos/sasp/-
%         Matlab_Computing_Spectrograms.html
title('Speech Sample Spectrogram');
% for classic look:
colormap('gray'); map = colormap; imap = flipud(map);
colormap(imap);