Sound fails to play

[ble]

URL is tomatoi.st/bpxh (and probably not relevant to the problem)

Browser is Chrome "21.0.1180.89 m" running on Windows 7

Stack trace is

Uncaught TypeError: Object # has no method '_createSound' soundmanager2.js:22
createSound soundmanager2.js:22
start.play soundmanager2.js:24
(anonymous function) pomodoro.js:21
z soundmanager2.js:70
onready soundmanager2.js:28
audibleAlert pomodoro.js:20
$.createTimer.buzzer pomodoro.js:36
(anonymous function)