Wad
Web Audio DAW. Use the HTML5 Web Audio API for dynamic sound synthesis. It's like jQuery for your ears.
Wavesurfer.js
Navigable waveform built on Web Audio and Canvas
Tuna
An audio effects library for Web Audio, made by www.dinahmoe.com
Jsmediatags
Media Tags Reader (ID3, MP4, FLAC)
Tone.js
A Web Audio framework for making interactive music in the browser.
Midi Writer Js
♬ JavaScript library providing an API for programmatically generating expressive multi-track MIDI files in browser and Node.
Pedalboard.js
Open source JavaScript framework for developing audio effects for guitars using the Web Audio API.
Flocking
Flocking - Creative audio synthesis for the Web
Midi.js
Making life easy to create a MIDI-app on the web. Includes a library to program synesthesia into your app for memory recognition or for creating trippy effects. Convert soundfonts for Guitar, Bass, Drums, ect. into code that can be read by the browser. Supports multiple simultaneous instruments and perfect timing.
Audio5js
The HTML5 Audio Compatibility Layer
Webaudio.js
web audio library for games
Pizzicato
Library to simplify the way you create and manipulate sounds with the Web Audio API.
Audio.js
A cross-browser javascript wrapper for the html5 audio tag
Waud
Web Audio Library
Howler.js
Javascript audio library for the modern web.
Mp3.js
A JavaScript MP3 decoder for Aurora.js
Speak.js
Text-to-Speech in JavaScript using eSpeak