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task_2.m

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+ec=5;
+fc=3000;
+fs=8000;
+fdev=10;
+t = (0:1/fs:0.2);
+x=input('Type S and press enter to start recording', 's');
+if x== 'S';
+    voice = audiorecorder;
+    disp('Recording started');
+recordblocking(voice, 10);
+disp('Recording stopped');
+o = getaudiodata(voice);
+filename = 'reordedAudio.wav';
+audiowrite(filename,o,fs);
+clear o fs
+[o,fs]=audioread(filename);
+subplot(4,1,1);
+plot(o);
+title('Original Signal');
+c=ec*2*pi*fc*t;
+subplot(4,1,2);
+plot(c);
+title('Carrier Signal');
+m=fmmod(o, fc, fs, fdev);
+subplot(4,1,3);
+plot(m);
+title('Modulated Signal');
+d=fmdemod(m,fc,fs,fdev);
+subplot(4,1,4);
+plot(d);
+title('Demodulated Signal');
+pause(5);
+sound(d);
+else
+    disp('You did not press the correct key')
+end