CHROME MUSIC LAB
From the Google blog:
“You can play with sound, rhythm, melody, and more. Chrome Music Lab is all built for the web, so you can start playing instantly, whether you’re on a tablet, phone, or laptop. Just like today’s Clara Rockmore doodle, the experiments are all built with the Web Audio API, a freely-accessible, open web standard that lets developers create and manipulate sound right in the browser. We’re also providing open-source code so that others can build new experiments based on what we’ve started.”