Spectrogram of Audio Signal

Hello,

I have a audio Signal , and have to plot the spectrogram of that Signal.

After coding, I have Fs=44100 and Sound signal= 448064*1

How can I plot this as both the matrix size does not match.

Please help me out

Thanks in Advance

clc;

clear all;

close all;

[y,Fs]= audioread('1kdrei.wav');

dt=1/Fs;

y_1= y(:,1);

win=hamming(512);

windowsize=256;

Answer 1

[Bjorn Gustavsson]

Have a look at the help and documentation of the spectrogram function. That allows you to calculate the spectrogram as such:

[S,F,T] = spectrogram(y(:,1),windowsize,windowsize/4,[],Fs);

Then you can plot the spectrogram using pcolor:

pcolor(T,F,log10(abs(S))),shading flat,colorbar

HTH