Audio stream processing options
As with video streams, once you have set up any audio streams from either a local or remote source to an <audio> media element, you can then start to explore processing the binary data using JavaScript. The evolving Web Audio API is designed to bring rich audio processing to the web and allows you to add filters and effects, visualize your audio streams, and much more. The latest specification of the Web Audio API is available at http://www.w3.org/TR/webaudio/, you can find some great example applications by Chris Wilson at http://webaudiodemos.appspot.com/.
