Concatenate two audio files

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SBakc
SBakc on 17 Aug 2019
Commented: Walter Roberson on 19 Aug 2019
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.
  1 Comment
Walter Roberson
Walter Roberson on 19 Aug 2019
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.

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Accepted Answer

Adam Danz
Adam Danz on 17 Aug 2019
Edited: Adam Danz on 19 Aug 2019
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

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