mozilla-b2g/gaia — pull request #6572 by ian-liu (2012-11-22 09:03:35+00:00)
Title: Bug 807418 - [Clock] No way to preview an alarm tone r=rlu r=alive

I suppose that we can receive "onchange" event when the value selector is showing and user selecting on it.
So, we can preview the alarm tone by the event.