Why make it google chrome specific when things like this run in other browsers:
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!