Error using sound in Xubuntu 20.04

Hi, I have installed Xubuntu 20.04 and then I have installed Matlab 2020.

I wrote the next code:

function suona(n)
h1=repmat([-1 1],1,250);
h2=repmat([-1 1],1,500);
h3=repmat([-1 1],1,1000);
for i=0:n
   sound(h1,2000)
   sound(h2,4000)
   sound(h3,8000)
end

then when I run i.e. suona(7) I receive the next error:

>> suona(7)
Error using sound (line 76)
Device Error: Invalid sample rate


Error in suona (line 6)
   sound(h1,2000)

The same code worked on the same laptop when there was Xubuntu 18.04.

I have installed Xubuntu 20.04 formatting the hard disk. My audio device is Intel Haswell HDMI.

a@PC07:~$ cat /proc/asound/card0/codec* | grep Codec
Codec: Intel Haswell HDMI

How can I do to work the sound function?