Create a signal from concatenating signals with pauses inbetween.

Greetings! I'm trying to create use sound on a signal creating by a random number of signals which should have pauses in between. The signals all have the same size so I was able to do it like this:

if true
  Y = 0;
  for ()
      sig = x();
      sigY = Y;
      Y = [sig sigY];
  end
end

Then I tried adding a signal with 0 value that lasts for as long as I want (pauses aren't fixed length) and concatenated this also like:

if true
  Y = 0;
  for ()
      sig = x();
      pauseSig = z();
      sigY = Y;
      Y = [sig pauseSig sigY];
  end
end

However when I run this there's no pause. I think that sound() skips the 0 value signal completely, instead of being "paused" for that duration. Am I doing something wrong, or is there another way to do this? Thanks a lot!

Answer 1

[Aditya Salveru]

Hi,

You can concatenate the signals with zeros of desired length to get a pause in the sound.

I have taken a sounds of three frequencies i.e 100,200,500 Hz and concatenated them along with a pause for a second. This actually works as intended.

You can find the code for the same below

fs=2000;                     %sampling rate.
t=0:1/fs:2-1/fs;             %time values.
x1=2*sin(2*pi*100*t);         %first sound.
x2=2*sin(2*pi*200*t);         %second sound.
x3=2*sin(2*pi*500*t);         %third sound.
pause=zeros(1,1*(fs));       %pause of length 2 seconds.
y=[x1 pause x2 pause x3];    %concatenation of sounds along with pause.
sound(y,fs);                  %playing the sound.

Hope this helps.

Thanks ,

Aditya.