3
Digital principles
3.1 Binary codes
In digital audio, binary numbers express the values of the samples which represent the original analog waveform. Digital audio recording consists of storing such numbers on a suitable medium, where the goal is to reproduce the numbers unchanged. However, if it is required to manipulate the audio waveform, this can be done in the digital domain by changing the sample values. To see how this can be done requires some knowledge of binary codes.
Figure 3.1 shows some binary numbers and their equivalent in decimal. The radix point has the same significance in binary: symbols to the right of it represent one half, one quarter and so on. Binary numbers easily become very long, and writing them by hand is tedious ...
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