Principles of Digital Audio, Sixth Edition, 6th Edition

CHAPTER 2Fundamentals of Digital Audio

The digital techniques used to record, reproduce, store, process, and transmit digital audio signals entail concepts foreign to analog audio methods. In fact, the inner workings of digital audio systems bear little resemblance to analog systems. Because audio itself is analog in nature, digital systems employ sampling and quantization, the twin pillars of audio digitization, to represent the audio information. Any sampling system is bound by the sampling theorem, which defines the relationship between the message and the sampling frequency. In particular, the theorem dictates that the message be bandlimited. Precaution must be taken to prevent a condition of erroneous sampling known as aliasing. Quantization ...