kata-06.md

Kata 6 - Audio worklets

The purpose of this kata is to understand what is an AudioWorklet and how it complements Web Audio API.

Learning aims

The minimal target of this kata is to get used to writing audio worklets and understand their value for music production:

• Setting up an AudioWorklet
• Understanding the relationship between Web Audio API and AudioWorklets

Task

Complete the following:

1. Implement a random noise generator using an audio worklet
2. Implement a sine oscillator using an audio worklet
3. Optional - implement a delay effect using an audio worklet
4. Optional - integrate a ladder filter to the system using an audio worklet
5. Optional - implement a crossfade worklet to allow

Reference

Web Audio

• Enter Audio Worklet
• Background audio processing using AudioWorklet
• Audio worklet design pattern
• Code examples and resources for Audio Worklet
• Stack Overflow - How to code an oscillator using Audioworklet?

Theory

• Circles, sines, and signals
• Bitcrusher

WASM

• A WASM implementation of Moog ladder filter for Web Audio Worklet Node
• WASM synth for Web Audio
• Wasm Audio Worklets API
• WASM audio worklet
• WebAssembly Music

DSP Code

• musicdsp.org - code snippets (in C) for common DSP tasks
• dsp.js

Filters

• The Moog Ladder Filter - 4 min explanation
• The Classic Sound of the Moog Ladder Filter
• Tutorial: Implementing a Basic Delay Effect