Need explanation of MATLAB code which creates echo. (SIGNAL PROCESSING) If the original audio signal is...

Need explanation of MATLAB code which creates echo. (SIGNAL PROCESSING)

If the original audio signal is x(t) then the echo is y(t) = x(t) + alpha*x(t-delay)

This code below creates this echo however I don't understand how every line of the code works, could someone comment this code so I can understand?

[x,Fs] = audioread('Hallelujah.wav');  
 sound(x,Fs);   
 delay = 0.5; % 0.5s delay  
 alpha = 0.65; % echo strength  
 D = delay*Fs;  
 y = zeros(size(x));  
 y(1:D) = x(1:D);  
   
 for i=D+1:length(x)  
   y(i) = x(i) + alpha*x(i-D);  
 end

Solutions

Expert Solution

desired graph

Manojponduru answered 3 months ago

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