MATLAB: Undefined function or variable ‘audioDatastore’.

Audio Toolboxaudiodatastore

I'm using R2017b

The toolbox is Audio System Toolbox

I cant run my program because of the error Undefined function or variable 'audioDatastore'.

How to fix or alternative

This function is introduced in R2019b.

https://www.mathworks.com/help/releases/R2019b/audio/ref/audiofeatureextractor.html

data(45001, :) = 0;
data = data(1:45000, 1);

No if needed, and handles multiple channels converting to single channel.