Oh ok, sounds cool. :) In which chrome version did it get supported?

I'm trying on chromium 23 on Linux Mint and only see 2 concentric circles and nothing is playing / moving.

Though here it seems not to complain like it does in FF when in chromium and I could hit a random play button on the page:

http://www.html5rocks.com/en/tutorials/webaudio/intro/

cheers!