the writing of Linux audio software on O'Reilly.
"Now, let's have a look at what we're trying to do and the main options available for doing it.
The three main things to do are capturing (recording) audio, replaying it, and altering it. All of this comes under the heading of Digital Signal Processing (DSP). We'll be looking at the first two options: capturing and replaying.
What we want to do is talk to the sound card in the computer, tell it what to do, what sort of arrangement the data should have (bearing in mind the card's capabilities), and then store it somewhere.
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