Question
Hello, I'd like to plot .wav file in time and frequency domain.
Expert Answer
John Williams
PhD Expert
Answered Aug 25, 2026
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)));
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