Spectrogram of Audio Signal

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Mangesh KAle
Mangesh KAle 2021-7-30
回答： Bjorn Gustavsson 2021-7-30
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;

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Bjorn Gustavsson
Bjorn Gustavsson 2021-7-30
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

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