$\%\%$ Audio Signal Processing

$[$audio$\_$data, Fs$\_$audio$]=$ audioread$(\text{'}$Try$.$wav'$)$; $\%$ Load audio file

audio$\_$data $=$ audio$\_$data$(1$:Fs$\_$audio$*5)$; $\%$ Extract $5$ seconds of audio

$\%$ Play Original Sound

disp$(\text{'}$Playing Original Sound...$\text{'})$;

sound$($audio$\_$data, Fs$\_$audio$)$;

pause$(1)$;

$\%$ ASK Modulation of Audio Signal

audio$\_$modulated $=[]$;

for i $=1$:length$($audio$\_$data$)$

if audio$\_$data$($i$)>0\mathrm{.}5$

audio$\_$modulated $=[$audio$\_$modulated A $*$ cos$(2*$ pi $*$ Fc $*$ t$)]$;

else

audio$\_$modulated $=[$audio$\_$modulated zeros$(1,$ length$($t$))]$;

end

end

$\%$ Add Noise to Modulated Audio

audio$\_$noisy$\_$high $=$ awgn$($audio$\_$modulated, SNR$1,$ 'measured'$)$;

audio$\_$noisy$\_$low $=$ awgn$($audio$\_$modulated, SNR$2,$ 'measured'$)$;

$\%$ Demodulation and Filtering of Audio

audio$\_$demodulated$\_$high $=[]$;

audio$\_$demodulated$\_$low $=[]$;

for i $=1$:length$($audio$\_$data$)$

$\%$ Demodulate noisy audio $($high noise$)$

segment$\_$high $=$ audio$\_$noisy$\_$high$(($i$-1)$length$($t$)+1$:ilength$($t$)).*$ carrier;

filtered$\_$high $=$ conv$($segment$\_$high, h$,$ 'same'$)$;

audio$\_$demodulated$\_$high $=[$audio$\_$demodulated$\_$high mean$($filtered$\_$high$)>0\mathrm{.}2]$; $\%$#ok

$\%$ Demodulate noisy audio $($low noise$)$

segment$\_$low $=$ audio$\_$noisy$\_$low$(($i$-1)$length$($t$)+1$:ilength$($t$)).*$ carrier;

filtered$\_$low $=$ conv$($segment$\_$low, h$,$ 'same'$)$;

audio$\_$demodulated$\_$low $=[$audio$\_$demodulated$\_$low mean$($filtered$\_$low$)>0\mathrm{.}2]$; $\%$#ok

end

$\%$ Play Filtered Sound

disp$(\text{'}$Playing Filtered Sound...$\text{'})$;

sound$($filtered$\_$high, Fs$\_$audio$)$; How do I change this code to use amplitude shift keying to modulate,filter and demodulate an audio,play the original,filtered and demodulated sounds and also plot them?