MATLAB: How to plot WAV file

Question

Hello,

I'd like to plot .wav file in time and frequency domain.

Answer 1

If this is the output of wavread, then see if you have two channels in y

[y,fs] = wavread(filename);

If y is two-channels, Nx2, then just plot one:

    y = y(:,1);
    dt = 1/fs;
    t = 0:dt:(length(y)*dt)-dt;
    plot(t,y); xlabel('Seconds'); ylabel('Amplitude');
    figure
    plot(psd(spectrum.periodogram,y,'Fs',fs,'NFFT',length(y)));