Web Audio Api
The Web Audio API, developed by the W3C Audio WG
Jsmediatags
Media Tags Reader (ID3, MP4, FLAC)
Alpha Tab
alphaTab is a cross platform music notation and guitar tablature rendering library.
Wavesurfer.js
Navigable waveform built on Web Audio and Canvas
Pizzicato
Library to simplify the way you create and manipulate sounds with the Web Audio API.
Midi Writer Js
♬ JavaScript library providing an API for programmatically generating expressive multi-track MIDI files in browser and Node.
Timbre.js
JavaScript library for objective sound programming
Waud
Web Audio Library
Tuna
An audio effects library for Web Audio, made by www.dinahmoe.com
Flac.js
FLAC decoder in JavaScript
Teoria
A JavaScript music theory framework.
Buzz
Buzz is a small but powerful Javascript library that allows you to easily take advantage of the new HTML5 audio element. It tries to degrade gracefully on non-modern browsers.
Audiolet
A JavaScript library for real-time audio synthesis and composition from within the browser
Audio.js
A cross-browser javascript wrapper for the html5 audio tag
Mp3.js
A JavaScript MP3 decoder for Aurora.js
Speak.js
Text-to-Speech in JavaScript using eSpeak
Webaudio.js
web audio library for games