Vexflow
A JavaScript library for rendering music notation and guitar tablature.
Midi Writer Js
♬ JavaScript library providing an API for programmatically generating expressive multi-track MIDI files in browser and Node.
Web Audio Api
The Web Audio API, developed by the W3C Audio WG
Alpha Tab
alphaTab is a cross platform music notation and guitar tablature rendering library.
Jsmediatags
Media Tags Reader (ID3, MP4, FLAC)
Wad
Web Audio DAW. Use the HTML5 Web Audio API for dynamic sound synthesis. It's like jQuery for your ears.
Flocking
Flocking - Creative audio synthesis for the Web
Tuna
An audio effects library for Web Audio, made by www.dinahmoe.com
Speak.js
Text-to-Speech in JavaScript using eSpeak
Audio5js
The HTML5 Audio Compatibility Layer
Howler.js
Javascript audio library for the modern web.
Amplitudejs
A Javascript library that allows you to control the design of your media controls in your webpage -- not the browser. No dependencies (jQuery not required)
Mp3.js
A JavaScript MP3 decoder for Aurora.js
Pedalboard.js
Open source JavaScript framework for developing audio effects for guitars using the Web Audio API.
Webaudio.js
web audio library for games
Audio.js
A cross-browser javascript wrapper for the html5 audio tag
Sound JS
A Javascript library for working with Audio. Features a simple interface as the front end to multiple audio APIs via a plugin model. Currently supports HTML5 Audio & Flash.