With full source code examples.
By Boris Smus at HTML5 Rocks
http://www.html5rocks.com/en/tutorials/webaudio/intro/
update 5/2014
To get full source with comments, make a URL in this format – (the buttons on the tutorial page only gives minified JS)
http://www.html5rocks.com/en/tutorials/webaudio/intro/js/rhythm-sample.js?ModPagespeed=off
Here’s a note about it: https://github.com/html5rocks/www.html5rocks.com/issues/367
To get the source for the UI – ie., buttons and sliders – just view the page source for the tutorial
Scheduling Web Audio
http://www.html5rocks.com/en/tutorials/audio/scheduling/
JAM with chrome case study
http://www.html5rocks.com/en/tutorials/casestudies/jamwithchrome-audio/
Case Study: Building Technitone.com
http://www.html5rocks.com/en/tutorials/casestudies/technitone/