How do i get the sound of a cosine signal

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I am trying to get the sound of a signal with different phases where its frequency is a frequency of a musical note. f=493.88. My code is below.
t=[0:0.2:20];
xc1=cos(2*pi*493.88*t);
xc12=cos(2*pi*493.88*t+pi/4);
xc13=cos(2*pi*493.88*t+pi/2);
xc14=cos(2*pi*493.88*t+pi);
soundsc(xc1, 1000)
When i try to run the sound i just get a tapping sound for 1 milisecond and then it stops. How do get the sound of the signal? Thank you in advance.

Accepted Answer

Scott MacKenzie
Scott MacKenzie on 12 Jun 2021
You've only got 100 sample points and the sampling rate is too low. Try this...
t=[0:0.2:2000];
xc1=cos(2*pi*493.88*t);
soundsc(xc1, 8000)
  4 Comments
Deniz Bozdogan
Deniz Bozdogan on 12 Jun 2021
That's what i was asking for thank you.

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More Answers (1)

Image Analyst
Image Analyst on 12 Jun 2021
Scott is right on.
For what it's worth, I'm attaching my demo for making a warbling, decaying chirp sound:

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