Sir, I have a resampled audio having sampling rate 2000hz in that i have to apply a antialiasing filter so how i will apply the antialiasing filter? The below code is i used for resampling the audio,

if true
  % code
end
[x, fs1] = audioread('audio3.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('audio1');
fs2 = (20/441)*fs1;
y=resample(x,2000,44100);
%sound(y,fs2);
 ts2=1/fs1;
 N2=length(y);
 Tmax2=(N2-1)*ts2;
 t2=(0:ts2:Tmax2);
 figure;
 plot(t2,y),xlabel('Time'),title('resampled audio1');

Answer 1

[Walter Roberson]

After resampling is too late.

https://www.mathworks.com/matlabcentral/answers/168609-anti-aliasing-filter-after-sampling

[Suchithra K S]

sir, i have no idea have to code that antialising filter in matlb. so can you please explain the code for me.

[Walter Roberson]

https://www.mathworks.com/help/signal/ug/downsampling-aliasing.html