CDPlayerJEW

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How a CD Player Works

A CD player reads a dicrete set of data off a CD. In short, a CD player takes this data and sends it through a digitla to analog converter, then through a low pass filter, and finally is output through speakers. A simple diagram illustrates this below.


Simple Block Diagram of Signal Pathway


When an audio CD is recorded, the music has an infinite amount of data points and can be represented as a continuous function of time . Because a medium, such as a CD, has a finite amount of space, it will not be able to hold since it has an infinite amount of data. Instead, the music is sampled at intervals to create a discrete function of time where is an integer and is the interval between samples.

This discrete signal can be represented mathematically by:



- Principle author of this page: Jeffrey Wonoprabowo

- Image Player Diagram by Aric Goe or Todd Caswell (not sure which since both of them had it on their pages)