Sir, how can I use antialiasing filter for audio after resampling? what is the code for that ? My resampling code is given below,

if true
  % code
end
[x, fs1] = audioread('cryrumble.wav');
%sound(x,fs1);
 ts1=1/fs1;
  N1=length(x);
  Tmax1=(N1-1)*ts1;
  t1=(0:ts1:Tmax1);
  figure;
plot(t1,x),xlabel('Time'),title('Original audio');
fs2 = (20/441)*fs1;
y=resample(x,2000,44100);
%sound(y,fs2);
 ts2=1/fs2;
 N2=length(y);
 Tmax2=(N2-1)*ts2;
 t2=(0:ts2:Tmax2);
 figure;
 plot(t2,y),xlabel('Time'),title('resampled audio');