How to use envelope function in Matlab?

The following Matlab code generate a sound but it contain tak tak like sound which can be easily heard.Can someone removes this noise by using envelope function.

Fs=44100;
T=1/Fs;
M=zeros(1,88);
for I=7:88
  M(I)=round(36.8*(2^(1/12))^(I-6));
  end
  signal=[];
  FrTm=[50,3;50,3;52,3;54,3;50,3;54,3;52,3;45,3;50,3;50,3;52,3;54,3;50,6;
  49,3;1,3;50,3;50,3;52,3;54,3;55,3;54,3;52,3;50,3;49,3;45,3;47,3;49,3;50,6;
  50,3;1,3;47,5;49,1;47,3;45,3;47,3;49,3;50,3;1,3;45,5;47,1;45,3;43,3;42,6;
  45,3;1,3;47,5;49,1;47,3;45,3;47,3;49,3;50,3;47,3;45,3;50,3;49,3;52,3;50,6;
  50,6];
  for i=1:length(FrTm)
    x=FrTm(i,1);
    y=FrTm(i,2);
    F=M(x);
    time=0:1/Fs:y/18;
    sinewave=*sin(2*pi*10*F*time);

      signal=[signal sinewave];

     end

     stem(signal)
     sound(signal,Fs)

[Star Strider]

The envelope function will not do what you want.

[Tayyab Shinwari]

then what is your suggestion? how to solve this problem? i think altering the code will understand me in better way.

[Jan]

Please fix your code: The line "sinewave=*sin(2*pi*10*F*time)" fails. If I insert "...= F * sin(..." the code runs (very slowly due to the forgotten pre-allocation). A funny sound is produced, but I do not have any idea, what the problem is. There is no "tak tak", therefore your "can be easily heard" is not a useful description. What exactly is the problem you want to solve?

[Tayyab Shinwari]

sorry there is no* before sinewave just multiply 2 amplitude it resolve even if you add pi to start it completly remove it

[Jan]

Sorry, there is a * before the sin command. I can see it. If it is a typo, please edit the question instead of leaving this confusing crashing line for the readers. Thanks.

I do not understand the rest of the comment: "just multiply 2 amplitude it resolve even if you add pi to start it completly remove it". What does this mean?

Answer 1

[Sambit Behura]

Use envelope(x) check this link for details https://in.mathworks.com/help/signal/ref/envelope.html