Digital Audio Theory: A Practical Guide

What happens between a sound entering a digital system and the effect, filter or virtual instrument a listener hears? Digital Audio Theory: A Practical Guide makes that journey the subject of a hands-on introduction to digital audio and signal processing.

Christopher L. Bennett builds from the essentials—sampling, aliasing, reconstruction, quantization and dither—toward the filters and spectral techniques used in audio software. Programming examples and projects connect the theory to practical audio work, making this a focused read for people who want to understand not just what digital audio tools do, but the principles behind them.

From audio signals to digital systems

The early chapters establish a foundation in describing audio signals and systems, then introduce complex vectors, phasors and sampling. From there, the book examines what can go wrong when a signal is sampled, how reconstruction works, and how quantization and dither affect digital audio.

Explore the building blocks of DSP

Readers move on to digital signal processing basics and the design and behavior of FIR and IIR filters. Later chapters address impulse-response measurements, the discrete Fourier transform, real-time spectral processing and analog modeling. The sequence gives the subject room to develop: core concepts first, then increasingly involved techniques and applications.

Learn by experimenting

Programming examples accompany the chapters, inviting readers to listen, inspect and test the concepts rather than leaving them as equations on a page. Projects apply the material to practical tasks such as audio effects, filter building, software synthesis, noise reduction, feedback control and impulse-response measurement.

For music and recording practitioners

Bennett writes for readers with interests in music, sound and recording, including music technologists, recording engineers and students. The book is designed to be approachable across different levels of prior knowledge in mathematics, signals and systems, and linear circuits, while still engaging with the underlying theory.

If you work with audio software—or want to understand the signal processing beneath it—this guide offers a structured route from digital-audio fundamentals to real-time processing, supported by code and practical projects.