Concatenate two audio files

I would like to concatenate two audio files such that a new audio signal is created whereby the first audio plays and this is then immedialely followed by the second.

  [y1,Fs] = audioread('sample1.wav');
  y1_sample_rate = 8000;
  [y2,Fs] = audioread('sample2.wav');
  y3 = [y1(1:y1_sample_rate,:); y2;];

What am I doing wrong?

Thank you.

[Walter Roberson]

We as outside observers have no reason to expect that the two audios will be at the same rate. You should be using resample() to bring them to a common rate.

We as outside observers also have no reason to expect that the two audios will have the same number of channels.

Answer 1

[Adam Danz]

If your intentions are to subsample every 8000 values in y1 and then concatenate y2 to the end,

y3 = [y1(1:y1_sample_rate:numel(y1)); y2]; 
%                         |________|    ^ no need for semicolon