Write a MATLAB function to implement the ADSR envelope and use the function to r

Question

Write a MATLAB function to implement the ADSR envelope and use the function to refine synthesized music notes. Your deliverables include: 1) MATLAB function for ADSR implementation; 2) A short piece of synthesized music without note refinement; 3) The same music after applying ADSR envelope. Write a MATLAB function to implement the ADSR envelope and use the function to refine synthesized music notes. Your deliverables include: 1) MATLAB function for ADSR implementation; 2) A short piece of synthesized music without note refinement; 3) The same music after applying ADSR envelope. Write a MATLAB function to implement the ADSR envelope and use the function to refine synthesized music notes. Your deliverables include: 1) MATLAB function for ADSR implementation; 2) A short piece of synthesized music without note refinement; 3) The same music after applying ADSR envelope.

Explanation / Answer

Matlab code for ADSR envelope:

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sig=ones(1,100);
A = linspace(0, 0.6, (length(sig)*0.2)); %rise 20% of signal
D = linspace(0.6, 0.5,(length(sig)*0.05)); %drop of 5% of signal
S = linspace(0.5, 0.5,(length(sig)*0.4)); %delay of 40% of signal
R = linspace(0.5, 0,(length(sig)*0.35)); %drop of 35% of signal

ADSR = [A D S R] ; %make a matrix

dif = length(sig) - length(ADSR); %find out the difference

x = cat(2, ADSR, zeros(1,dif)); %concatenate

plot(x)

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