jsfx : This is a javascript library (with frontend) for sound effect generation.
meSing.js : meSing.js is a JavaScript singing synthesis library that uses the Web Audio API's DSP capabilities in conjunction with the meSpeak.js speech synthesis...
SoundManager 2 : Using HTML5 and Flash, SoundManager 2 provides reliable cross-platform audio under a single JavaScript API.
howler.js : howler.js is an audio library for the modern web. It defaults to Web Audio API and falls back to HTML5 Audio.
Wave.js : Audio visualizer library for javascript. Create dynamic animations that react to an audio file or audio stream.
jsmad is a pure javascript MP3 decoder, based on libmad, with an ID3 decoder written from scratch.