1st Edition

Working with the Web Audio API

By Joshua Reiss Copyright 2022
    268 Pages 56 B/W Illustrations
    by Focal Press

    268 Pages 56 B/W Illustrations
    by Focal Press

    Working with the Web Audio API is the definitive and instructive guide to understanding and using the Web Audio API.

    The Web Audio API provides a powerful and versatile system for controlling audio on the Web. It allows developers to generate sounds, select sources, add effects, create visualizations and render audio scenes in an immersive environment.

    This book covers all essential features, with easy to implement code examples for every aspect. All the theory behind it is explained, so that one can understand the design choices as well as the core audio processing concepts. Advanced concepts are also covered, so that the reader will gain the skills to build complex audio applications running in the browser.

    Aimed at a wide audience of potential students, researchers and coders, this is a comprehensive guide to the functionality of this industry-standard tool for creating audio applications for the web.

    List of Figures

    List of Code Examples




    Chapter 1 Introducing the Web Audio API

    Interlude - Generating sound with scheduled sources

    Chapter 2 Oscillators

    Chapter 3 Audio Buffer sources

    Chapter 4 The Constant Source Node

    Interlude – Audio parameters

    Chapter 5 Scheduling and setting parameters

    Chapter 6 Connecting Audio Parameters and Modulation

    Interlude – Destination and Source nodes

    Chapter 7 Analysis and Visualization

    Chapter 8 Loading, playing and recording

    Chapter 9 OfflineAudioContext

    Interlude – Audio effects

    Chapter 10 Delay

    Chapter 11 Filtering

    Chapter 12 Waveshaper

    Chapter 13 Dynamic range compression

    Chapter 14 Reverberation

    Interlude – Multichannel audio

    Chapter 15 Mixing audio

    Chapter 16 Stereo panning

    Chapter 17 Spatialized sound

    Interlude – Audio worklets

    Chapter 18 Working with AudioWorklets

    Chapter 19 The wonders of audio worklets


    Appendix – The Web Audio API Interfaces



    Joshua Reiss is a Professor with the Centre for Digital Music at Queen Mary University of London. He has published more than 200 scientific papers, and co-authored the book Intelligent Music Production, and textbook Audio Effects: Theory, Implementation and Application. At the time of writing, he is the President of the Audio Engineering Society (AES). He co-founded the highly successful spin-out company, LandR, and recently co-founded the start-ups Tonz and Nemisindo. His primary focus of research is on state-of-the-art signal processing techniques for sound design and audio production. He maintains a popular blog, YouTube channel and twitter feed for scientific education and research dissemination.