how to get Emacs org-mode to play sound file on DONE state?

Question

I'd like org-mode to reward me for completing a task by playing a nice sound when I change the state of a TODO item to DONE.

I tried two variations in my .emacs file, neither one worked. I'm on Aquamacs on OSX.

Neither of these worked:

'(org-after-todo-state-change-hook (quote (org-clock-out-if-current) (play-sound-file "~/Library/Sounds/InkSoundStroke3.aif")))

'(org-after-todo-state-change-hook (quote (org-clock-out-if-current)     (start-process-shell-command "afplay" nil "mplayer ~/Library/Sounds/InkSoundStroke3.aif")))

Answer 1

Edit: if you check the docstring for the hook (C-hv org-after-todo-state-change-hook RET) you'll see that the new state is available in the variable org-state, so we can test for that:

(add-hook 'org-after-todo-state-change-hook 'my-org-after-todo-state-change)
(defun my-org-after-todo-state-change ()
  (when (string-equal org-state "DONE")
    (org-clock-out-if-current)
    (play-sound-file "~/Library/Sounds/InkSoundStroke3.aif")))