MATLAB: Can anyone please tell what the below code does

Question

[y, fs] = audioread('title.wav');
y = y(:,1);
dt = 1/fs;
t = 0:dt:(length(y)*dt)-dt;
plot(t,y);

Answer 1

It reads the 'title.wav file, and returns a (Nx2) matrix ‘y’, and sampling frequency ‘fs’. It selects the left channel as ‘y’ (that is then an (Nx1) vector), then calculates the sampling interval ‘dt’, calculates a time vector ‘t’, and plots ‘y’ as a function of ‘t’.