How to extract amplitude data from wav. file?

Hi, I have some wav. files of echolocation calls of bats that I need to analyze. I want to plot the amplitude as a function of time. Can someone point me in the right direction? An online tutorial would help a lot.

Thanks!

Answer 1

[KSSV]

Doc audioread..

[y,fs] = audioread(filename);

    dt = 1/fs;
    t = 0:dt:(length(y)*dt)-dt;
    plot(t,y); 
     xlabel('Seconds'); 
     ylabel ('Amplitude');

[Mike Jin]

Thanks for helping. I tried the code, but I ran into a problem... Do you know what's wrong? Sorry, I've never used matlab before...

[KSSV]

Note that the variable is Fs not fs....this is a typo error...type Fs instead of fs..

[Mike Jin]

Ohh, got it. Thanks