Web Audio API: Build a Digital Synthesizer in under 50 Lines of JavaScript
Making Noise: Build a Digital Synthesizer in 50 Lines of JavaScript For a long time, playing sound in a web browser meant using the clunky <audio> HTML tag. You could play, pause, or loop an existing MP3 file, but you couldn't manipulate the sound wave itself, generate raw sound waves, or create real-time audio effects. That all changed with the introduction of the Web Audio API . The Web Audio API is a high-performance system for controlling audio on the Web, allowing developers to generate sound synthesis, design spatial effects, analyze audio frequencies, and much more. In this post, we’ll build a fully working, interactive monophonic synthesizer in under 50 lines of pure JavaScript. ๐ต How the Web Audio API Works: The Audio Graph The Web Audio API operates on the concept of an **Audio Graph**. Instead of calling simple playback methods, you construct a network of modular **Audio Nodes** connected together, similar to linking guitar effects pedals with cables: ...