After understanding the basics of how a computer works with general information, it is possible to focus more specifically on audio information.

 

Even when working with audio, it can be helpful to keep in mind that computers process many types of information at a simple level. I mention this because I hope you do not feel intimidated about taking the next step to work with audio information. Audio is only slightly¬†more complicated, but it is nothing you can’t handle if you are comfortable with numbers, strings, and arrays.

 

As you will see, digital audio signals are nothing more than numbers. It just so happens that there are a lot of things that we can do with audio when it is represented by numbers.

 

In this section, we will look at a few basic, but important, ways of working with audio in the Matlab programming language. This will include importing and exporting audio, as well as playing sound over a computer’s sound card.

 

First, let’s have a look at what is an audio signal.

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