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. Can you please type it out and not write it out by hand

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"Function to generate ADSR envelope function[a]=adsr_gen(target,gain,duration) fs=16000; a=zeros(fs,1); duration=round(duration./1000.*fs); start=2; stop=duration(1); %attack phase for n=(start:stop) a(n)=target(1)*gain(1)+(1-gain(1))*a(n-1); end %Sustain phase start=stop+1; stop=start+duration(2); for n=(start:stop) a(n)=target(2)*gain(2)+(1-gain(2))*a(n-1); end %Release phase start=stop + 1; stop=sum(duration); for n=(start:stop) a(n)=target(3)*gain(3)+(1-gain(3))*a(n-1); end B.Function to generate sinusoid function[x]=singen(f,fs,N) n=(0:N-1); x=sin(2*pi*f/fs*n); C. Composer/Player code function [] = sound_play(f) target=[0.99999;0.25;0]; gain=[0.005;0.0004;0.00075]; duration=[250;1250;500]; fs=16000; tot_dur=floor(sum(duration)/fs); [adsr]=adsr_gen(target,gain,duration); figure(1) plot(adsr); x=singen(f,fs,length(adsr)); figure(2) plot(x); b=adsr.';"

THERE ARE ERRORS IN ALL THREE PARTS